Home / 88,231.20-132,152.40-78,381.60

Finding the Fourth Proportional to 88,231.20, 132,152.40 and 78,381.60

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Solution

The fourth proportional to 88,231.20, 132,152.40 and 78,381.60 is: 117,399.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,231.20 : 132,152.40 = 78,381.60 : x
  2. Step 2: Convert to fraction form
    88,231.20/132,152.40 = 78,381.60/x
  3. Step 3: Cross multiply
    88,231.20x = 132,152.40 × 78,381.60
  4. Step 4: Simplify right side
    88,231.20x = 10,358,316,555.84
  5. Step 5: Solve for x
    x = 10,358,316,555.84/88,231.20
  6. Step 6: Final answer
    x = 117,399.70

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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.