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Finding the Fourth Proportional to 121,021.60, 181,532.40 and 74,300.80

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Solution

The fourth proportional to 121,021.60, 181,532.40 and 74,300.80 is: 111,451.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,021.60 : 181,532.40 = 74,300.80 : x
  2. Step 2: Convert to fraction form
    121,021.60/181,532.40 = 74,300.80/x
  3. Step 3: Cross multiply
    121,021.60x = 181,532.40 × 74,300.80
  4. Step 4: Simplify right side
    121,021.60x = 13,488,002,545.92
  5. Step 5: Solve for x
    x = 13,488,002,545.92/121,021.60
  6. Step 6: Final answer
    x = 111,451.20

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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.