Home / 111,129.17-153,334.62-65,821.41

Finding the Fourth Proportional to 111,129.17, 153,334.62 and 65,821.41

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Solution

The fourth proportional to 111,129.17, 153,334.62 and 65,821.41 is: 90,819.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,129.17 : 153,334.62 = 65,821.41 : x
  2. Step 2: Convert to fraction form
    111,129.17/153,334.62 = 65,821.41/x
  3. Step 3: Cross multiply
    111,129.17x = 153,334.62 × 65,821.41
  4. Step 4: Simplify right side
    111,129.17x = 10,092,700,890.21
  5. Step 5: Solve for x
    x = 10,092,700,890.21/111,129.17
  6. Step 6: Final answer
    x = 90,819.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.