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Finding the Fourth Proportional to 78,423.84, 117,539.42 and 36,246.84

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Solution

The fourth proportional to 78,423.84, 117,539.42 and 36,246.84 is: 54,325.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,423.84 : 117,539.42 = 36,246.84 : x
  2. Step 2: Convert to fraction form
    78,423.84/117,539.42 = 36,246.84/x
  3. Step 3: Cross multiply
    78,423.84x = 117,539.42 × 36,246.84
  4. Step 4: Simplify right side
    78,423.84x = 4,260,432,550.43
  5. Step 5: Solve for x
    x = 4,260,432,550.43/78,423.84
  6. Step 6: Final answer
    x = 54,325.73

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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.