Home / 81,070.03-121,355.79-69,112.57

Finding the Fourth Proportional to 81,070.03, 121,355.79 and 69,112.57

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Solution

The fourth proportional to 81,070.03, 121,355.79 and 69,112.57 is: 103,456.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,070.03 : 121,355.79 = 69,112.57 : x
  2. Step 2: Convert to fraction form
    81,070.03/121,355.79 = 69,112.57/x
  3. Step 3: Cross multiply
    81,070.03x = 121,355.79 × 69,112.57
  4. Step 4: Simplify right side
    81,070.03x = 8,387,210,531.28
  5. Step 5: Solve for x
    x = 8,387,210,531.28/81,070.03
  6. Step 6: Final answer
    x = 103,456.36

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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.