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Finding the Fourth Proportional to 109,712.88, 151,403.88 and 61,966.32

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Solution

The fourth proportional to 109,712.88, 151,403.88 and 61,966.32 is: 85,513.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,712.88 : 151,403.88 = 61,966.32 : x
  2. Step 2: Convert to fraction form
    109,712.88/151,403.88 = 61,966.32/x
  3. Step 3: Cross multiply
    109,712.88x = 151,403.88 × 61,966.32
  4. Step 4: Simplify right side
    109,712.88x = 9,381,941,277.32
  5. Step 5: Solve for x
    x = 9,381,941,277.32/109,712.88
  6. Step 6: Final answer
    x = 85,513.58

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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.