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Finding the Fourth Proportional to 113,889.92, 170,716 and 38,988

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Solution

The fourth proportional to 113,889.92, 170,716 and 38,988 is: 58,441.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,889.92 : 170,716 = 38,988 : x
  2. Step 2: Convert to fraction form
    113,889.92/170,716 = 38,988/x
  3. Step 3: Cross multiply
    113,889.92x = 170,716 × 38,988
  4. Step 4: Simplify right side
    113,889.92x = 6,655,875,408
  5. Step 5: Solve for x
    x = 6,655,875,408/113,889.92
  6. Step 6: Final answer
    x = 58,441.30

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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.