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Finding the Fourth Proportional to 77,252.78, 115,699.34 and 75,124.64

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Solution

The fourth proportional to 77,252.78, 115,699.34 and 75,124.64 is: 112,512.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,252.78 : 115,699.34 = 75,124.64 : x
  2. Step 2: Convert to fraction form
    77,252.78/115,699.34 = 75,124.64/x
  3. Step 3: Cross multiply
    77,252.78x = 115,699.34 × 75,124.64
  4. Step 4: Simplify right side
    77,252.78x = 8,691,871,265.74
  5. Step 5: Solve for x
    x = 8,691,871,265.74/77,252.78
  6. Step 6: Final answer
    x = 112,512.08

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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.