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Finding the Fourth Proportional to 77,314.72, 106,909.08 and 61,371.52

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Solution

The fourth proportional to 77,314.72, 106,909.08 and 61,371.52 is: 84,863.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,314.72 : 106,909.08 = 61,371.52 : x
  2. Step 2: Convert to fraction form
    77,314.72/106,909.08 = 61,371.52/x
  3. Step 3: Cross multiply
    77,314.72x = 106,909.08 × 61,371.52
  4. Step 4: Simplify right side
    77,314.72x = 6,561,172,741.40
  5. Step 5: Solve for x
    x = 6,561,172,741.40/77,314.72
  6. Step 6: Final answer
    x = 84,863.18

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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.