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Finding the Fourth Proportional to 113,005.20, 155,964.60 and 65,254.80

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Solution

The fourth proportional to 113,005.20, 155,964.60 and 65,254.80 is: 90,061.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,005.20 : 155,964.60 = 65,254.80 : x
  2. Step 2: Convert to fraction form
    113,005.20/155,964.60 = 65,254.80/x
  3. Step 3: Cross multiply
    113,005.20x = 155,964.60 × 65,254.80
  4. Step 4: Simplify right side
    113,005.20x = 10,177,438,780.08
  5. Step 5: Solve for x
    x = 10,177,438,780.08/113,005.20
  6. Step 6: Final answer
    x = 90,061.69

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1.5x scale

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.