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Finding the Fourth Proportional to 113,512.90, 170,010.15 and 66,856.90

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Solution

The fourth proportional to 113,512.90, 170,010.15 and 66,856.90 is: 100,132.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,512.90 : 170,010.15 = 66,856.90 : x
  2. Step 2: Convert to fraction form
    113,512.90/170,010.15 = 66,856.90/x
  3. Step 3: Cross multiply
    113,512.90x = 170,010.15 × 66,856.90
  4. Step 4: Simplify right side
    113,512.90x = 11,366,351,597.54
  5. Step 5: Solve for x
    x = 11,366,351,597.54/113,512.90
  6. Step 6: Final answer
    x = 100,132.69

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1.5x scale

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.