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Finding the Fourth Proportional to 113,478.11, 156,576.06 and 65,728.61

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Solution

The fourth proportional to 113,478.11, 156,576.06 and 65,728.61 is: 90,691.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,478.11 : 156,576.06 = 65,728.61 : x
  2. Step 2: Convert to fraction form
    113,478.11/156,576.06 = 65,728.61/x
  3. Step 3: Cross multiply
    113,478.11x = 156,576.06 × 65,728.61
  4. Step 4: Simplify right side
    113,478.11x = 10,291,526,783.08
  5. Step 5: Solve for x
    x = 10,291,526,783.08/113,478.11
  6. Step 6: Final answer
    x = 90,691.74

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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.