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Finding the Fourth Proportional to 60,557.20, 90,835.80 and 21,101.20

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Solution

The fourth proportional to 60,557.20, 90,835.80 and 21,101.20 is: 31,651.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,557.20 : 90,835.80 = 21,101.20 : x
  2. Step 2: Convert to fraction form
    60,557.20/90,835.80 = 21,101.20/x
  3. Step 3: Cross multiply
    60,557.20x = 90,835.80 × 21,101.20
  4. Step 4: Simplify right side
    60,557.20x = 1,916,744,382.96
  5. Step 5: Solve for x
    x = 1,916,744,382.96/60,557.20
  6. Step 6: Final answer
    x = 31,651.80

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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.