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Finding the Fourth Proportional to 61,690.53, 92,521.94 and 28,378.61

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Solution

The fourth proportional to 61,690.53, 92,521.94 and 28,378.61 is: 42,561.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,690.53 : 92,521.94 = 28,378.61 : x
  2. Step 2: Convert to fraction form
    61,690.53/92,521.94 = 28,378.61/x
  3. Step 3: Cross multiply
    61,690.53x = 92,521.94 × 28,378.61
  4. Step 4: Simplify right side
    61,690.53x = 2,625,643,447.20
  5. Step 5: Solve for x
    x = 2,625,643,447.20/61,690.53
  6. Step 6: Final answer
    x = 42,561.53

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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.