Home / 72,000.90-108,001.35-57,129.30

Finding the Fourth Proportional to 72,000.90, 108,001.35 and 57,129.30

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Solution

The fourth proportional to 72,000.90, 108,001.35 and 57,129.30 is: 85,693.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,000.90 : 108,001.35 = 57,129.30 : x
  2. Step 2: Convert to fraction form
    72,000.90/108,001.35 = 57,129.30/x
  3. Step 3: Cross multiply
    72,000.90x = 108,001.35 × 57,129.30
  4. Step 4: Simplify right side
    72,000.90x = 6,170,041,524.56
  5. Step 5: Solve for x
    x = 6,170,041,524.56/72,000.90
  6. Step 6: Final answer
    x = 85,693.95

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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.