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Finding the Fourth Proportional to 108,508.65, 149,689.12 and 70,257.21

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Solution

The fourth proportional to 108,508.65, 149,689.12 and 70,257.21 is: 96,920.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,508.65 : 149,689.12 = 70,257.21 : x
  2. Step 2: Convert to fraction form
    108,508.65/149,689.12 = 70,257.21/x
  3. Step 3: Cross multiply
    108,508.65x = 149,689.12 × 70,257.21
  4. Step 4: Simplify right side
    108,508.65x = 10,516,739,938.56
  5. Step 5: Solve for x
    x = 10,516,739,938.56/108,508.65
  6. Step 6: Final answer
    x = 96,920.75

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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.