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Finding the Fourth Proportional to 78,335.60, 117,568.20 and 36,280.40

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Solution

The fourth proportional to 78,335.60, 117,568.20 and 36,280.40 is: 54,450.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,335.60 : 117,568.20 = 36,280.40 : x
  2. Step 2: Convert to fraction form
    78,335.60/117,568.20 = 36,280.40/x
  3. Step 3: Cross multiply
    78,335.60x = 117,568.20 × 36,280.40
  4. Step 4: Simplify right side
    78,335.60x = 4,265,421,323.28
  5. Step 5: Solve for x
    x = 4,265,421,323.28/78,335.60
  6. Step 6: Final answer
    x = 54,450.61

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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.