Home / 131,870.77-181,981.40-71,442.90

Finding the Fourth Proportional to 131,870.77, 181,981.40 and 71,442.90

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Solution

The fourth proportional to 131,870.77, 181,981.40 and 71,442.90 is: 98,591.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,870.77 : 181,981.40 = 71,442.90 : x
  2. Step 2: Convert to fraction form
    131,870.77/181,981.40 = 71,442.90/x
  3. Step 3: Cross multiply
    131,870.77x = 181,981.40 × 71,442.90
  4. Step 4: Simplify right side
    131,870.77x = 13,001,278,604.85
  5. Step 5: Solve for x
    x = 13,001,278,604.85/131,870.77
  6. Step 6: Final answer
    x = 98,591.06

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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.