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Finding the Fourth Proportional to 108,507.65, 149,687.75 and 70,256.21

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Solution

The fourth proportional to 108,507.65, 149,687.75 and 70,256.21 is: 96,919.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,507.65 : 149,687.75 = 70,256.21 : x
  2. Step 2: Convert to fraction form
    108,507.65/149,687.75 = 70,256.21/x
  3. Step 3: Cross multiply
    108,507.65x = 149,687.75 × 70,256.21
  4. Step 4: Simplify right side
    108,507.65x = 10,516,493,647.15
  5. Step 5: Solve for x
    x = 10,516,493,647.15/108,507.65
  6. Step 6: Final answer
    x = 96,919.38

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Find fourth proportional to 108,508.65, 149,689.12 and 70,257.21
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.