Home / 81,332.40-121,998.60-53,428.80

Finding the Fourth Proportional to 81,332.40, 121,998.60 and 53,428.80

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Solution

The fourth proportional to 81,332.40, 121,998.60 and 53,428.80 is: 80,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,332.40 : 121,998.60 = 53,428.80 : x
  2. Step 2: Convert to fraction form
    81,332.40/121,998.60 = 53,428.80/x
  3. Step 3: Cross multiply
    81,332.40x = 121,998.60 × 53,428.80
  4. Step 4: Simplify right side
    81,332.40x = 6,518,238,799.68
  5. Step 5: Solve for x
    x = 6,518,238,799.68/81,332.40
  6. Step 6: Final answer
    x = 80,143.20

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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.