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Finding the Fourth Proportional to 61,691.40, 92,510.10 and 28,400.40

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Solution

The fourth proportional to 61,691.40, 92,510.10 and 28,400.40 is: 42,588.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,691.40 : 92,510.10 = 28,400.40 : x
  2. Step 2: Convert to fraction form
    61,691.40/92,510.10 = 28,400.40/x
  3. Step 3: Cross multiply
    61,691.40x = 92,510.10 × 28,400.40
  4. Step 4: Simplify right side
    61,691.40x = 2,627,323,844.04
  5. Step 5: Solve for x
    x = 2,627,323,844.04/61,691.40
  6. Step 6: Final answer
    x = 42,588.17

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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.