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Finding the Fourth Proportional to 60,587.52, 90,874.80 and 21,145.40

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Solution

The fourth proportional to 60,587.52, 90,874.80 and 21,145.40 is: 31,715.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,587.52 : 90,874.80 = 21,145.40 : x
  2. Step 2: Convert to fraction form
    60,587.52/90,874.80 = 21,145.40/x
  3. Step 3: Cross multiply
    60,587.52x = 90,874.80 × 21,145.40
  4. Step 4: Simplify right side
    60,587.52x = 1,921,583,995.92
  5. Step 5: Solve for x
    x = 1,921,583,995.92/60,587.52
  6. Step 6: Final answer
    x = 31,715.84

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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.