Home / 72,311.16-99,788.36-40,042.72

Finding the Fourth Proportional to 72,311.16, 99,788.36 and 40,042.72

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Solution

The fourth proportional to 72,311.16, 99,788.36 and 40,042.72 is: 55,258.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,311.16 : 99,788.36 = 40,042.72 : x
  2. Step 2: Convert to fraction form
    72,311.16/99,788.36 = 40,042.72/x
  3. Step 3: Cross multiply
    72,311.16x = 99,788.36 × 40,042.72
  4. Step 4: Simplify right side
    72,311.16x = 3,995,797,358.74
  5. Step 5: Solve for x
    x = 3,995,797,358.74/72,311.16
  6. Step 6: Final answer
    x = 55,258.38

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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.