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Finding the Fourth Proportional to 74,934.40, 112,401.60 and 71,478.40

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Solution

The fourth proportional to 74,934.40, 112,401.60 and 71,478.40 is: 107,217.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,934.40 : 112,401.60 = 71,478.40 : x
  2. Step 2: Convert to fraction form
    74,934.40/112,401.60 = 71,478.40/x
  3. Step 3: Cross multiply
    74,934.40x = 112,401.60 × 71,478.40
  4. Step 4: Simplify right side
    74,934.40x = 8,034,286,525.44
  5. Step 5: Solve for x
    x = 8,034,286,525.44/74,934.40
  6. Step 6: Final answer
    x = 107,217.60

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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.