Home / 72,220.08-99,650.80-40,389.20

Finding the Fourth Proportional to 72,220.08, 99,650.80 and 40,389.20

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Solution

The fourth proportional to 72,220.08, 99,650.80 and 40,389.20 is: 55,729.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,220.08 : 99,650.80 = 40,389.20 : x
  2. Step 2: Convert to fraction form
    72,220.08/99,650.80 = 40,389.20/x
  3. Step 3: Cross multiply
    72,220.08x = 99,650.80 × 40,389.20
  4. Step 4: Simplify right side
    72,220.08x = 4,024,816,091.36
  5. Step 5: Solve for x
    x = 4,024,816,091.36/72,220.08
  6. Step 6: Final answer
    x = 55,729.88

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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.