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Finding the Fourth Proportional to 420,737.88, 631,106.82 and 105,194.79

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Solution

The fourth proportional to 420,737.88, 631,106.82 and 105,194.79 is: 157,792.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,737.88 : 631,106.82 = 105,194.79 : x
  2. Step 2: Convert to fraction form
    420,737.88/631,106.82 = 105,194.79/x
  3. Step 3: Cross multiply
    420,737.88x = 631,106.82 × 105,194.79
  4. Step 4: Simplify right side
    420,737.88x = 66,389,149,397.47
  5. Step 5: Solve for x
    x = 66,389,149,397.47/420,737.88
  6. Step 6: Final answer
    x = 157,792.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.