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Finding the Fourth Proportional to 93,990.65, 129,715.29 and 51,557.38

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Solution

The fourth proportional to 93,990.65, 129,715.29 and 51,557.38 is: 71,153.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,990.65 : 129,715.29 = 51,557.38 : x
  2. Step 2: Convert to fraction form
    93,990.65/129,715.29 = 51,557.38/x
  3. Step 3: Cross multiply
    93,990.65x = 129,715.29 × 51,557.38
  4. Step 4: Simplify right side
    93,990.65x = 6,687,780,498.34
  5. Step 5: Solve for x
    x = 6,687,780,498.34/93,990.65
  6. Step 6: Final answer
    x = 71,153.68

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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.