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Finding the Fourth Proportional to 77,248.78, 115,693.35 and 75,120.64

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Solution

The fourth proportional to 77,248.78, 115,693.35 and 75,120.64 is: 112,506.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,248.78 : 115,693.35 = 75,120.64 : x
  2. Step 2: Convert to fraction form
    77,248.78/115,693.35 = 75,120.64/x
  3. Step 3: Cross multiply
    77,248.78x = 115,693.35 × 75,120.64
  4. Step 4: Simplify right side
    77,248.78x = 8,690,958,495.74
  5. Step 5: Solve for x
    x = 8,690,958,495.74/77,248.78
  6. Step 6: Final answer
    x = 112,506.09

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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.