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Finding the Fourth Proportional to 125,065.78, 187,550.82 and 61,864.21

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Solution

The fourth proportional to 125,065.78, 187,550.82 and 61,864.21 is: 92,772.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,065.78 : 187,550.82 = 61,864.21 : x
  2. Step 2: Convert to fraction form
    125,065.78/187,550.82 = 61,864.21/x
  3. Step 3: Cross multiply
    125,065.78x = 187,550.82 × 61,864.21
  4. Step 4: Simplify right side
    125,065.78x = 11,602,683,314.15
  5. Step 5: Solve for x
    x = 11,602,683,314.15/125,065.78
  6. Step 6: Final answer
    x = 92,772.65

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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.