Home / 138,770.16-207,968.76-72,071.52

Finding the Fourth Proportional to 138,770.16, 207,968.76 and 72,071.52

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Solution

The fourth proportional to 138,770.16, 207,968.76 and 72,071.52 is: 108,010.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,770.16 : 207,968.76 = 72,071.52 : x
  2. Step 2: Convert to fraction form
    138,770.16/207,968.76 = 72,071.52/x
  3. Step 3: Cross multiply
    138,770.16x = 207,968.76 × 72,071.52
  4. Step 4: Simplify right side
    138,770.16x = 14,988,624,645.72
  5. Step 5: Solve for x
    x = 14,988,624,645.72/138,770.16
  6. Step 6: Final answer
    x = 108,010.43

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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.