Home / 112,478.32-155,158.68-72,147.22

Finding the Fourth Proportional to 112,478.32, 155,158.68 and 72,147.22

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Solution

The fourth proportional to 112,478.32, 155,158.68 and 72,147.22 is: 99,523.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,478.32 : 155,158.68 = 72,147.22 : x
  2. Step 2: Convert to fraction form
    112,478.32/155,158.68 = 72,147.22/x
  3. Step 3: Cross multiply
    112,478.32x = 155,158.68 × 72,147.22
  4. Step 4: Simplify right side
    112,478.32x = 11,194,267,420.87
  5. Step 5: Solve for x
    x = 11,194,267,420.87/112,478.32
  6. Step 6: Final answer
    x = 99,523.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.