Home / 71,945.76-99,288-40,120.32

Finding the Fourth Proportional to 71,945.76, 99,288 and 40,120.32

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Solution

The fourth proportional to 71,945.76, 99,288 and 40,120.32 is: 55,367.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,945.76 : 99,288 = 40,120.32 : x
  2. Step 2: Convert to fraction form
    71,945.76/99,288 = 40,120.32/x
  3. Step 3: Cross multiply
    71,945.76x = 99,288 × 40,120.32
  4. Step 4: Simplify right side
    71,945.76x = 3,983,466,332.16
  5. Step 5: Solve for x
    x = 3,983,466,332.16/71,945.76
  6. Step 6: Final answer
    x = 55,367.63

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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.