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Finding the Fourth Proportional to 60,611.61, 90,825.15 and 28,978.21

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Solution

The fourth proportional to 60,611.61, 90,825.15 and 28,978.21 is: 43,423.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,611.61 : 90,825.15 = 28,978.21 : x
  2. Step 2: Convert to fraction form
    60,611.61/90,825.15 = 28,978.21/x
  3. Step 3: Cross multiply
    60,611.61x = 90,825.15 × 28,978.21
  4. Step 4: Simplify right side
    60,611.61x = 2,631,949,818.29
  5. Step 5: Solve for x
    x = 2,631,949,818.29/60,611.61
  6. Step 6: Final answer
    x = 43,423.20

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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.