Home / 72,145.17-99,560.84-40,315.41

Finding the Fourth Proportional to 72,145.17, 99,560.84 and 40,315.41

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Solution

The fourth proportional to 72,145.17, 99,560.84 and 40,315.41 is: 55,635.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,145.17 : 99,560.84 = 40,315.41 : x
  2. Step 2: Convert to fraction form
    72,145.17/99,560.84 = 40,315.41/x
  3. Step 3: Cross multiply
    72,145.17x = 99,560.84 × 40,315.41
  4. Step 4: Simplify right side
    72,145.17x = 4,013,835,882.97
  5. Step 5: Solve for x
    x = 4,013,835,882.97/72,145.17
  6. Step 6: Final answer
    x = 55,635.55

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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.