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Finding the Fourth Proportional to 60,122.40, 90,191.70 and 20,691.60

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Solution

The fourth proportional to 60,122.40, 90,191.70 and 20,691.60 is: 31,040.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,122.40 : 90,191.70 = 20,691.60 : x
  2. Step 2: Convert to fraction form
    60,122.40/90,191.70 = 20,691.60/x
  3. Step 3: Cross multiply
    60,122.40x = 90,191.70 × 20,691.60
  4. Step 4: Simplify right side
    60,122.40x = 1,866,210,579.72
  5. Step 5: Solve for x
    x = 1,866,210,579.72/60,122.40
  6. Step 6: Final answer
    x = 31,040.19

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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.