Home / 87,705.60-131,428.80-74,486.40

Finding the Fourth Proportional to 87,705.60, 131,428.80 and 74,486.40

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Solution

The fourth proportional to 87,705.60, 131,428.80 and 74,486.40 is: 111,619.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,705.60 : 131,428.80 = 74,486.40 : x
  2. Step 2: Convert to fraction form
    87,705.60/131,428.80 = 74,486.40/x
  3. Step 3: Cross multiply
    87,705.60x = 131,428.80 × 74,486.40
  4. Step 4: Simplify right side
    87,705.60x = 9,789,658,168.32
  5. Step 5: Solve for x
    x = 9,789,658,168.32/87,705.60
  6. Step 6: Final answer
    x = 111,619.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.