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Finding the Fourth Proportional to 72,549.28, 100,127.80 and 40,719.94

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Solution

The fourth proportional to 72,549.28, 100,127.80 and 40,719.94 is: 56,199.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,549.28 : 100,127.80 = 40,719.94 : x
  2. Step 2: Convert to fraction form
    72,549.28/100,127.80 = 40,719.94/x
  3. Step 3: Cross multiply
    72,549.28x = 100,127.80 × 40,719.94
  4. Step 4: Simplify right side
    72,549.28x = 4,077,198,008.33
  5. Step 5: Solve for x
    x = 4,077,198,008.33/72,549.28
  6. Step 6: Final answer
    x = 56,199.01

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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.