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Finding the Fourth Proportional to 98,884.78, 136,470.78 and 56,449.70

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Solution

The fourth proportional to 98,884.78, 136,470.78 and 56,449.70 is: 77,906.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,884.78 : 136,470.78 = 56,449.70 : x
  2. Step 2: Convert to fraction form
    98,884.78/136,470.78 = 56,449.70/x
  3. Step 3: Cross multiply
    98,884.78x = 136,470.78 × 56,449.70
  4. Step 4: Simplify right side
    98,884.78x = 7,703,734,589.77
  5. Step 5: Solve for x
    x = 7,703,734,589.77/98,884.78
  6. Step 6: Final answer
    x = 77,906.17

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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.