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Finding the Fourth Proportional to 60,312.80, 90,469.20 and 54,189.20

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Solution

The fourth proportional to 60,312.80, 90,469.20 and 54,189.20 is: 81,283.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,312.80 : 90,469.20 = 54,189.20 : x
  2. Step 2: Convert to fraction form
    60,312.80/90,469.20 = 54,189.20/x
  3. Step 3: Cross multiply
    60,312.80x = 90,469.20 × 54,189.20
  4. Step 4: Simplify right side
    60,312.80x = 4,902,453,572.64
  5. Step 5: Solve for x
    x = 4,902,453,572.64/60,312.80
  6. Step 6: Final answer
    x = 81,283.80

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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.