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Finding the Fourth Proportional to 94,136, 129,901.20 and 51,685.76

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Solution

The fourth proportional to 94,136, 129,901.20 and 51,685.76 is: 71,322.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,136 : 129,901.20 = 51,685.76 : x
  2. Step 2: Convert to fraction form
    94,136/129,901.20 = 51,685.76/x
  3. Step 3: Cross multiply
    94,136x = 129,901.20 × 51,685.76
  4. Step 4: Simplify right side
    94,136x = 6,714,042,246.91
  5. Step 5: Solve for x
    x = 6,714,042,246.91/94,136
  6. Step 6: Final answer
    x = 71,322.79

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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.