Home / 99,389.70-137,179.17-65,401.29

Finding the Fourth Proportional to 99,389.70, 137,179.17 and 65,401.29

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Solution

The fourth proportional to 99,389.70, 137,179.17 and 65,401.29 is: 90,267.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,389.70 : 137,179.17 = 65,401.29 : x
  2. Step 2: Convert to fraction form
    99,389.70/137,179.17 = 65,401.29/x
  3. Step 3: Cross multiply
    99,389.70x = 137,179.17 × 65,401.29
  4. Step 4: Simplify right side
    99,389.70x = 8,971,694,679.13
  5. Step 5: Solve for x
    x = 8,971,694,679.13/99,389.70
  6. Step 6: Final answer
    x = 90,267.85

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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.