Home / 72,130.40-108,001.20-52,301.60

Finding the Fourth Proportional to 72,130.40, 108,001.20 and 52,301.60

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Solution

The fourth proportional to 72,130.40, 108,001.20 and 52,301.60 is: 78,311.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,130.40 : 108,001.20 = 52,301.60 : x
  2. Step 2: Convert to fraction form
    72,130.40/108,001.20 = 52,301.60/x
  3. Step 3: Cross multiply
    72,130.40x = 108,001.20 × 52,301.60
  4. Step 4: Simplify right side
    72,130.40x = 5,648,635,561.92
  5. Step 5: Solve for x
    x = 5,648,635,561.92/72,130.40
  6. Step 6: Final answer
    x = 78,311.44

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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.