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Finding the Fourth Proportional to 86,542.40, 129,813.60 and 53,472.80

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Solution

The fourth proportional to 86,542.40, 129,813.60 and 53,472.80 is: 80,209.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,542.40 : 129,813.60 = 53,472.80 : x
  2. Step 2: Convert to fraction form
    86,542.40/129,813.60 = 53,472.80/x
  3. Step 3: Cross multiply
    86,542.40x = 129,813.60 × 53,472.80
  4. Step 4: Simplify right side
    86,542.40x = 6,941,496,670.08
  5. Step 5: Solve for x
    x = 6,941,496,670.08/86,542.40
  6. Step 6: Final answer
    x = 80,209.20

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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.