Home / 131,479.32-181,454.16-77,781.60

Finding the Fourth Proportional to 131,479.32, 181,454.16 and 77,781.60

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Solution

The fourth proportional to 131,479.32, 181,454.16 and 77,781.60 is: 107,346.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,479.32 : 181,454.16 = 77,781.60 : x
  2. Step 2: Convert to fraction form
    131,479.32/181,454.16 = 77,781.60/x
  3. Step 3: Cross multiply
    131,479.32x = 181,454.16 × 77,781.60
  4. Step 4: Simplify right side
    131,479.32x = 14,113,794,891.46
  5. Step 5: Solve for x
    x = 14,113,794,891.46/131,479.32
  6. Step 6: Final answer
    x = 107,346.12

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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.