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Finding the Fourth Proportional to 131,301, 181,195.38 and 71,685

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Solution

The fourth proportional to 131,301, 181,195.38 and 71,685 is: 98,925.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,301 : 181,195.38 = 71,685 : x
  2. Step 2: Convert to fraction form
    131,301/181,195.38 = 71,685/x
  3. Step 3: Cross multiply
    131,301x = 181,195.38 × 71,685
  4. Step 4: Simplify right side
    131,301x = 12,988,990,815.30
  5. Step 5: Solve for x
    x = 12,988,990,815.30/131,301
  6. Step 6: Final answer
    x = 98,925.30

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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.