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Finding the Fourth Proportional to 74,136.80, 111,205.20 and 54,502.40

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Solution

The fourth proportional to 74,136.80, 111,205.20 and 54,502.40 is: 81,753.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,136.80 : 111,205.20 = 54,502.40 : x
  2. Step 2: Convert to fraction form
    74,136.80/111,205.20 = 54,502.40/x
  3. Step 3: Cross multiply
    74,136.80x = 111,205.20 × 54,502.40
  4. Step 4: Simplify right side
    74,136.80x = 6,060,950,292.48
  5. Step 5: Solve for x
    x = 6,060,950,292.48/74,136.80
  6. Step 6: Final answer
    x = 81,753.60

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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.