Home / 142,084.83-196,063.11-78,418.53

Finding the Fourth Proportional to 142,084.83, 196,063.11 and 78,418.53

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Solution

The fourth proportional to 142,084.83, 196,063.11 and 78,418.53 is: 108,209.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,084.83 : 196,063.11 = 78,418.53 : x
  2. Step 2: Convert to fraction form
    142,084.83/196,063.11 = 78,418.53/x
  3. Step 3: Cross multiply
    142,084.83x = 196,063.11 × 78,418.53
  4. Step 4: Simplify right side
    142,084.83x = 15,374,980,873.43
  5. Step 5: Solve for x
    x = 15,374,980,873.43/142,084.83
  6. Step 6: Final answer
    x = 108,209.87

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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.