Home / 81,029.16-121,368.78-79,046.28

Finding the Fourth Proportional to 81,029.16, 121,368.78 and 79,046.28

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Solution

The fourth proportional to 81,029.16, 121,368.78 and 79,046.28 is: 118,398.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,029.16 : 121,368.78 = 79,046.28 : x
  2. Step 2: Convert to fraction form
    81,029.16/121,368.78 = 79,046.28/x
  3. Step 3: Cross multiply
    81,029.16x = 121,368.78 × 79,046.28
  4. Step 4: Simplify right side
    81,029.16x = 9,593,750,567.14
  5. Step 5: Solve for x
    x = 9,593,750,567.14/81,029.16
  6. Step 6: Final answer
    x = 118,398.74

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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.