Home / 142,633.95-196,837.85-78,105.90

Finding the Fourth Proportional to 142,633.95, 196,837.85 and 78,105.90

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Solution

The fourth proportional to 142,633.95, 196,837.85 and 78,105.90 is: 107,787.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,633.95 : 196,837.85 = 78,105.90 : x
  2. Step 2: Convert to fraction form
    142,633.95/196,837.85 = 78,105.90/x
  3. Step 3: Cross multiply
    142,633.95x = 196,837.85 × 78,105.90
  4. Step 4: Simplify right side
    142,633.95x = 15,374,197,428.32
  5. Step 5: Solve for x
    x = 15,374,197,428.32/142,633.95
  6. Step 6: Final answer
    x = 107,787.78

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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.