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Finding the Fourth Proportional to 58,220.80, 87,331.20 and 21,299.20

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Solution

The fourth proportional to 58,220.80, 87,331.20 and 21,299.20 is: 31,948.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,220.80 : 87,331.20 = 21,299.20 : x
  2. Step 2: Convert to fraction form
    58,220.80/87,331.20 = 21,299.20/x
  3. Step 3: Cross multiply
    58,220.80x = 87,331.20 × 21,299.20
  4. Step 4: Simplify right side
    58,220.80x = 1,860,084,695.04
  5. Step 5: Solve for x
    x = 1,860,084,695.04/58,220.80
  6. Step 6: Final answer
    x = 31,948.80

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Similar ratio
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1.5x scale

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.