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Finding the Fourth Proportional to 75,880.80, 113,821.20 and 40,451.40

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Solution

The fourth proportional to 75,880.80, 113,821.20 and 40,451.40 is: 60,677.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,880.80 : 113,821.20 = 40,451.40 : x
  2. Step 2: Convert to fraction form
    75,880.80/113,821.20 = 40,451.40/x
  3. Step 3: Cross multiply
    75,880.80x = 113,821.20 × 40,451.40
  4. Step 4: Simplify right side
    75,880.80x = 4,604,226,889.68
  5. Step 5: Solve for x
    x = 4,604,226,889.68/75,880.80
  6. Step 6: Final answer
    x = 60,677.10

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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.