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Finding the Fourth Proportional to 138,671.71, 208,038.68 and 43,907.57

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Solution

The fourth proportional to 138,671.71, 208,038.68 and 43,907.57 is: 65,871.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,671.71 : 208,038.68 = 43,907.57 : x
  2. Step 2: Convert to fraction form
    138,671.71/208,038.68 = 43,907.57/x
  3. Step 3: Cross multiply
    138,671.71x = 208,038.68 × 43,907.57
  4. Step 4: Simplify right side
    138,671.71x = 9,134,472,589.87
  5. Step 5: Solve for x
    x = 9,134,472,589.87/138,671.71
  6. Step 6: Final answer
    x = 65,871.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.