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Finding the Fourth Proportional to 81,007.70, 121,292.85 and 81,007.70

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Solution

The fourth proportional to 81,007.70, 121,292.85 and 81,007.70 is: 121,292.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,007.70 : 121,292.85 = 81,007.70 : x
  2. Step 2: Convert to fraction form
    81,007.70/121,292.85 = 81,007.70/x
  3. Step 3: Cross multiply
    81,007.70x = 121,292.85 × 81,007.70
  4. Step 4: Simplify right side
    81,007.70x = 9,825,654,804.95
  5. Step 5: Solve for x
    x = 9,825,654,804.95/81,007.70
  6. Step 6: Final answer
    x = 121,292.85

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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.