Home / 91,312.35-136,979.46-38,715

Finding the Fourth Proportional to 91,312.35, 136,979.46 and 38,715

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Solution

The fourth proportional to 91,312.35, 136,979.46 and 38,715 is: 58,077.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,312.35 : 136,979.46 = 38,715 : x
  2. Step 2: Convert to fraction form
    91,312.35/136,979.46 = 38,715/x
  3. Step 3: Cross multiply
    91,312.35x = 136,979.46 × 38,715
  4. Step 4: Simplify right side
    91,312.35x = 5,303,159,793.90
  5. Step 5: Solve for x
    x = 5,303,159,793.90/91,312.35
  6. Step 6: Final answer
    x = 58,077.14

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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.