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Finding the Fourth Proportional to 91,002.40, 136,337.28 and 65,980.48

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Solution

The fourth proportional to 91,002.40, 136,337.28 and 65,980.48 is: 98,850.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,002.40 : 136,337.28 = 65,980.48 : x
  2. Step 2: Convert to fraction form
    91,002.40/136,337.28 = 65,980.48/x
  3. Step 3: Cross multiply
    91,002.40x = 136,337.28 × 65,980.48
  4. Step 4: Simplify right side
    91,002.40x = 8,995,599,176.29
  5. Step 5: Solve for x
    x = 8,995,599,176.29/91,002.40
  6. Step 6: Final answer
    x = 98,850.13

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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.