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Finding the Fourth Proportional to 81,350.82, 121,951.50 and 28,030.10

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Solution

The fourth proportional to 81,350.82, 121,951.50 and 28,030.10 is: 42,019.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,350.82 : 121,951.50 = 28,030.10 : x
  2. Step 2: Convert to fraction form
    81,350.82/121,951.50 = 28,030.10/x
  3. Step 3: Cross multiply
    81,350.82x = 121,951.50 × 28,030.10
  4. Step 4: Simplify right side
    81,350.82x = 3,418,312,740.15
  5. Step 5: Solve for x
    x = 3,418,312,740.15/81,350.82
  6. Step 6: Final answer
    x = 42,019.40

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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.