Home / 91,719.40-137,579.10-70,983.40

Finding the Fourth Proportional to 91,719.40, 137,579.10 and 70,983.40

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Solution

The fourth proportional to 91,719.40, 137,579.10 and 70,983.40 is: 106,475.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,719.40 : 137,579.10 = 70,983.40 : x
  2. Step 2: Convert to fraction form
    91,719.40/137,579.10 = 70,983.40/x
  3. Step 3: Cross multiply
    91,719.40x = 137,579.10 × 70,983.40
  4. Step 4: Simplify right side
    91,719.40x = 9,765,832,286.94
  5. Step 5: Solve for x
    x = 9,765,832,286.94/91,719.40
  6. Step 6: Final answer
    x = 106,475.10

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Similar ratio
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1.5x scale

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.