Home / 78,123.20-117,325.60-68,446.40

Finding the Fourth Proportional to 78,123.20, 117,325.60 and 68,446.40

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Solution

The fourth proportional to 78,123.20, 117,325.60 and 68,446.40 is: 102,792.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,123.20 : 117,325.60 = 68,446.40 : x
  2. Step 2: Convert to fraction form
    78,123.20/117,325.60 = 68,446.40/x
  3. Step 3: Cross multiply
    78,123.20x = 117,325.60 × 68,446.40
  4. Step 4: Simplify right side
    78,123.20x = 8,030,514,947.84
  5. Step 5: Solve for x
    x = 8,030,514,947.84/78,123.20
  6. Step 6: Final answer
    x = 102,792.96

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1.5x scale

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.