Home / 99,321.20-136,929.09-67,434.74

Finding the Fourth Proportional to 99,321.20, 136,929.09 and 67,434.74

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Solution

The fourth proportional to 99,321.20, 136,929.09 and 67,434.74 is: 92,968.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,321.20 : 136,929.09 = 67,434.74 : x
  2. Step 2: Convert to fraction form
    99,321.20/136,929.09 = 67,434.74/x
  3. Step 3: Cross multiply
    99,321.20x = 136,929.09 × 67,434.74
  4. Step 4: Simplify right side
    99,321.20x = 9,233,777,582.59
  5. Step 5: Solve for x
    x = 9,233,777,582.59/99,321.20
  6. Step 6: Final answer
    x = 92,968.85

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1.5x scale

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.