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Finding the Fourth Proportional to 101,134.71, 139,565.70 and 55,815.48

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Solution

The fourth proportional to 101,134.71, 139,565.70 and 55,815.48 is: 77,025.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,134.71 : 139,565.70 = 55,815.48 : x
  2. Step 2: Convert to fraction form
    101,134.71/139,565.70 = 55,815.48/x
  3. Step 3: Cross multiply
    101,134.71x = 139,565.70 × 55,815.48
  4. Step 4: Simplify right side
    101,134.71x = 7,789,926,537.04
  5. Step 5: Solve for x
    x = 7,789,926,537.04/101,134.71
  6. Step 6: Final answer
    x = 77,025.25

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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.