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Finding the Fourth Proportional to 72,243.78, 99,700.29 and 40,410.78

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Solution

The fourth proportional to 72,243.78, 99,700.29 and 40,410.78 is: 55,769.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,243.78 : 99,700.29 = 40,410.78 : x
  2. Step 2: Convert to fraction form
    72,243.78/99,700.29 = 40,410.78/x
  3. Step 3: Cross multiply
    72,243.78x = 99,700.29 × 40,410.78
  4. Step 4: Simplify right side
    72,243.78x = 4,028,966,485.13
  5. Step 5: Solve for x
    x = 4,028,966,485.13/72,243.78
  6. Step 6: Final answer
    x = 55,769.04

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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.