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Finding the Fourth Proportional to 100,732.79, 139,031.02 and 57,741.12

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Solution

The fourth proportional to 100,732.79, 139,031.02 and 57,741.12 is: 79,694.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,732.79 : 139,031.02 = 57,741.12 : x
  2. Step 2: Convert to fraction form
    100,732.79/139,031.02 = 57,741.12/x
  3. Step 3: Cross multiply
    100,732.79x = 139,031.02 × 57,741.12
  4. Step 4: Simplify right side
    100,732.79x = 8,027,806,809.54
  5. Step 5: Solve for x
    x = 8,027,806,809.54/100,732.79
  6. Step 6: Final answer
    x = 79,694.08

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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.