Home / 129,066.90-178,114.59-71,711.48

Finding the Fourth Proportional to 129,066.90, 178,114.59 and 71,711.48

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Solution

The fourth proportional to 129,066.90, 178,114.59 and 71,711.48 is: 98,963.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,066.90 : 178,114.59 = 71,711.48 : x
  2. Step 2: Convert to fraction form
    129,066.90/178,114.59 = 71,711.48/x
  3. Step 3: Cross multiply
    129,066.90x = 178,114.59 × 71,711.48
  4. Step 4: Simplify right side
    129,066.90x = 12,772,859,967.92
  5. Step 5: Solve for x
    x = 12,772,859,967.92/129,066.90
  6. Step 6: Final answer
    x = 98,963.10

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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.