Home / 81,042.16-121,605.36-61,314.88

Finding the Fourth Proportional to 81,042.16, 121,605.36 and 61,314.88

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Solution

The fourth proportional to 81,042.16, 121,605.36 and 61,314.88 is: 92,004.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,042.16 : 121,605.36 = 61,314.88 : x
  2. Step 2: Convert to fraction form
    81,042.16/121,605.36 = 61,314.88/x
  3. Step 3: Cross multiply
    81,042.16x = 121,605.36 × 61,314.88
  4. Step 4: Simplify right side
    81,042.16x = 7,456,218,055.76
  5. Step 5: Solve for x
    x = 7,456,218,055.76/81,042.16
  6. Step 6: Final answer
    x = 92,004.19

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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.