Home / 72,145.44-99,561.20-40,315.68

Finding the Fourth Proportional to 72,145.44, 99,561.20 and 40,315.68

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Solution

The fourth proportional to 72,145.44, 99,561.20 and 40,315.68 is: 55,635.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,145.44 : 99,561.20 = 40,315.68 : x
  2. Step 2: Convert to fraction form
    72,145.44/99,561.20 = 40,315.68/x
  3. Step 3: Cross multiply
    72,145.44x = 99,561.20 × 40,315.68
  4. Step 4: Simplify right side
    72,145.44x = 4,013,877,479.62
  5. Step 5: Solve for x
    x = 4,013,877,479.62/72,145.44
  6. Step 6: Final answer
    x = 55,635.91

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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.