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Finding the Fourth Proportional to 113,908.30, 170,862.45 and 66,474.70

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Solution

The fourth proportional to 113,908.30, 170,862.45 and 66,474.70 is: 99,712.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,908.30 : 170,862.45 = 66,474.70 : x
  2. Step 2: Convert to fraction form
    113,908.30/170,862.45 = 66,474.70/x
  3. Step 3: Cross multiply
    113,908.30x = 170,862.45 × 66,474.70
  4. Step 4: Simplify right side
    113,908.30x = 11,358,030,105.02
  5. Step 5: Solve for x
    x = 11,358,030,105.02/113,908.30
  6. Step 6: Final answer
    x = 99,712.05

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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.