Home / 83,981.76-126,147.60-70,859.84

Finding the Fourth Proportional to 83,981.76, 126,147.60 and 70,859.84

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Solution

The fourth proportional to 83,981.76, 126,147.60 and 70,859.84 is: 106,437.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,981.76 : 126,147.60 = 70,859.84 : x
  2. Step 2: Convert to fraction form
    83,981.76/126,147.60 = 70,859.84/x
  3. Step 3: Cross multiply
    83,981.76x = 126,147.60 × 70,859.84
  4. Step 4: Simplify right side
    83,981.76x = 8,938,798,752.38
  5. Step 5: Solve for x
    x = 8,938,798,752.38/83,981.76
  6. Step 6: Final answer
    x = 106,437.38

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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.