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Finding the Fourth Proportional to 61,685.40, 92,309.40 and 42,002.40

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Solution

The fourth proportional to 61,685.40, 92,309.40 and 42,002.40 is: 62,854.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,685.40 : 92,309.40 = 42,002.40 : x
  2. Step 2: Convert to fraction form
    61,685.40/92,309.40 = 42,002.40/x
  3. Step 3: Cross multiply
    61,685.40x = 92,309.40 × 42,002.40
  4. Step 4: Simplify right side
    61,685.40x = 3,877,216,342.56
  5. Step 5: Solve for x
    x = 3,877,216,342.56/61,685.40
  6. Step 6: Final answer
    x = 62,854.68

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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.