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Finding the Fourth Proportional to 60,423, 90,611.36 and 19,887

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Solution

The fourth proportional to 60,423, 90,611.36 and 19,887 is: 29,822.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,423 : 90,611.36 = 19,887 : x
  2. Step 2: Convert to fraction form
    60,423/90,611.36 = 19,887/x
  3. Step 3: Cross multiply
    60,423x = 90,611.36 × 19,887
  4. Step 4: Simplify right side
    60,423x = 1,801,988,116.32
  5. Step 5: Solve for x
    x = 1,801,988,116.32/60,423
  6. Step 6: Final answer
    x = 29,822.88

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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.