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Finding the Fourth Proportional to 129,115.01, 178,192.51 and 75,417.48

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Solution

The fourth proportional to 129,115.01, 178,192.51 and 75,417.48 is: 104,084.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,115.01 : 178,192.51 = 75,417.48 : x
  2. Step 2: Convert to fraction form
    129,115.01/178,192.51 = 75,417.48/x
  3. Step 3: Cross multiply
    129,115.01x = 178,192.51 × 75,417.48
  4. Step 4: Simplify right side
    129,115.01x = 13,438,829,870.53
  5. Step 5: Solve for x
    x = 13,438,829,870.53/129,115.01
  6. Step 6: Final answer
    x = 104,084.18

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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.