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Finding the Fourth Proportional to 56,060, 77,368.26 and 30,909.50

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Solution

The fourth proportional to 56,060, 77,368.26 and 30,909.50 is: 42,658.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,060 : 77,368.26 = 30,909.50 : x
  2. Step 2: Convert to fraction form
    56,060/77,368.26 = 30,909.50/x
  3. Step 3: Cross multiply
    56,060x = 77,368.26 × 30,909.50
  4. Step 4: Simplify right side
    56,060x = 2,391,414,232.47
  5. Step 5: Solve for x
    x = 2,391,414,232.47/56,060
  6. Step 6: Final answer
    x = 42,658.12

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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.