Home / 72,221.08-99,652.18-40,390.20

Finding the Fourth Proportional to 72,221.08, 99,652.18 and 40,390.20

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Solution

The fourth proportional to 72,221.08, 99,652.18 and 40,390.20 is: 55,731.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,221.08 : 99,652.18 = 40,390.20 : x
  2. Step 2: Convert to fraction form
    72,221.08/99,652.18 = 40,390.20/x
  3. Step 3: Cross multiply
    72,221.08x = 99,652.18 × 40,390.20
  4. Step 4: Simplify right side
    72,221.08x = 4,024,971,480.64
  5. Step 5: Solve for x
    x = 4,024,971,480.64/72,221.08
  6. Step 6: Final answer
    x = 55,731.26

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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.