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Finding the Fourth Proportional to 123,386.60, 185,123.10 and 53,287.40

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Solution

The fourth proportional to 123,386.60, 185,123.10 and 53,287.40 is: 79,949.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,386.60 : 185,123.10 = 53,287.40 : x
  2. Step 2: Convert to fraction form
    123,386.60/185,123.10 = 53,287.40/x
  3. Step 3: Cross multiply
    123,386.60x = 185,123.10 × 53,287.40
  4. Step 4: Simplify right side
    123,386.60x = 9,864,728,678.94
  5. Step 5: Solve for x
    x = 9,864,728,678.94/123,386.60
  6. Step 6: Final answer
    x = 79,949.76

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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.