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Finding the Fourth Proportional to 56,151, 77,488.38 and 31,000.68

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Solution

The fourth proportional to 56,151, 77,488.38 and 31,000.68 is: 42,780.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,151 : 77,488.38 = 31,000.68 : x
  2. Step 2: Convert to fraction form
    56,151/77,488.38 = 31,000.68/x
  3. Step 3: Cross multiply
    56,151x = 77,488.38 × 31,000.68
  4. Step 4: Simplify right side
    56,151x = 2,402,192,472.10
  5. Step 5: Solve for x
    x = 2,402,192,472.10/56,151
  6. Step 6: Final answer
    x = 42,780.94

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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.