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Finding the Fourth Proportional to 99,960.67, 137,944.78 and 56,349.26

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Solution

The fourth proportional to 99,960.67, 137,944.78 and 56,349.26 is: 77,761.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,960.67 : 137,944.78 = 56,349.26 : x
  2. Step 2: Convert to fraction form
    99,960.67/137,944.78 = 56,349.26/x
  3. Step 3: Cross multiply
    99,960.67x = 137,944.78 × 56,349.26
  4. Step 4: Simplify right side
    99,960.67x = 7,773,086,273.86
  5. Step 5: Solve for x
    x = 7,773,086,273.86/99,960.67
  6. Step 6: Final answer
    x = 77,761.45

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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.