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Finding the Fourth Proportional to 108,120.87, 149,196.87 and 69,881.58

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Solution

The fourth proportional to 108,120.87, 149,196.87 and 69,881.58 is: 96,430.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,120.87 : 149,196.87 = 69,881.58 : x
  2. Step 2: Convert to fraction form
    108,120.87/149,196.87 = 69,881.58/x
  3. Step 3: Cross multiply
    108,120.87x = 149,196.87 × 69,881.58
  4. Step 4: Simplify right side
    108,120.87x = 10,426,113,006.65
  5. Step 5: Solve for x
    x = 10,426,113,006.65/108,120.87
  6. Step 6: Final answer
    x = 96,430.16

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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.