Home / 142,101.18-213,151.80-72,000.54

Finding the Fourth Proportional to 142,101.18, 213,151.80 and 72,000.54

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Solution

The fourth proportional to 142,101.18, 213,151.80 and 72,000.54 is: 108,000.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,101.18 : 213,151.80 = 72,000.54 : x
  2. Step 2: Convert to fraction form
    142,101.18/213,151.80 = 72,000.54/x
  3. Step 3: Cross multiply
    142,101.18x = 213,151.80 × 72,000.54
  4. Step 4: Simplify right side
    142,101.18x = 15,347,044,701.97
  5. Step 5: Solve for x
    x = 15,347,044,701.97/142,101.18
  6. Step 6: Final answer
    x = 108,000.83

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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.