Home / 81,064.86-121,348.14-69,107.46

Finding the Fourth Proportional to 81,064.86, 121,348.14 and 69,107.46

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Solution

The fourth proportional to 81,064.86, 121,348.14 and 69,107.46 is: 103,448.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,064.86 : 121,348.14 = 69,107.46 : x
  2. Step 2: Convert to fraction form
    81,064.86/121,348.14 = 69,107.46/x
  3. Step 3: Cross multiply
    81,064.86x = 121,348.14 × 69,107.46
  4. Step 4: Simplify right side
    81,064.86x = 8,386,061,731.12
  5. Step 5: Solve for x
    x = 8,386,061,731.12/81,064.86
  6. Step 6: Final answer
    x = 103,448.79

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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.