Home / 86,520.30-129,780.45-53,132.10

Finding the Fourth Proportional to 86,520.30, 129,780.45 and 53,132.10

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Solution

The fourth proportional to 86,520.30, 129,780.45 and 53,132.10 is: 79,698.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,520.30 : 129,780.45 = 53,132.10 : x
  2. Step 2: Convert to fraction form
    86,520.30/129,780.45 = 53,132.10/x
  3. Step 3: Cross multiply
    86,520.30x = 129,780.45 × 53,132.10
  4. Step 4: Simplify right side
    86,520.30x = 6,895,507,847.45
  5. Step 5: Solve for x
    x = 6,895,507,847.45/86,520.30
  6. Step 6: Final answer
    x = 79,698.15

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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.