Home / 75,436.32-113,139.90-71,689.80

Finding the Fourth Proportional to 75,436.32, 113,139.90 and 71,689.80

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Solution

The fourth proportional to 75,436.32, 113,139.90 and 71,689.80 is: 107,520.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,436.32 : 113,139.90 = 71,689.80 : x
  2. Step 2: Convert to fraction form
    75,436.32/113,139.90 = 71,689.80/x
  3. Step 3: Cross multiply
    75,436.32x = 113,139.90 × 71,689.80
  4. Step 4: Simplify right side
    75,436.32x = 8,110,976,803.02
  5. Step 5: Solve for x
    x = 8,110,976,803.02/75,436.32
  6. Step 6: Final answer
    x = 107,520.84

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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.