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Finding the Fourth Proportional to 131,508.86, 181,482.17 and 71,079.49

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Solution

The fourth proportional to 131,508.86, 181,482.17 and 71,079.49 is: 98,089.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,508.86 : 181,482.17 = 71,079.49 : x
  2. Step 2: Convert to fraction form
    131,508.86/181,482.17 = 71,079.49/x
  3. Step 3: Cross multiply
    131,508.86x = 181,482.17 × 71,079.49
  4. Step 4: Simplify right side
    131,508.86x = 12,899,659,959.15
  5. Step 5: Solve for x
    x = 12,899,659,959.15/131,508.86
  6. Step 6: Final answer
    x = 98,089.67

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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.