Home / 126,878.40-174,810.24-83,781.36

Finding the Fourth Proportional to 126,878.40, 174,810.24 and 83,781.36

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Solution

The fourth proportional to 126,878.40, 174,810.24 and 83,781.36 is: 115,432.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,878.40 : 174,810.24 = 83,781.36 : x
  2. Step 2: Convert to fraction form
    126,878.40/174,810.24 = 83,781.36/x
  3. Step 3: Cross multiply
    126,878.40x = 174,810.24 × 83,781.36
  4. Step 4: Simplify right side
    126,878.40x = 14,645,839,649.13
  5. Step 5: Solve for x
    x = 14,645,839,649.13/126,878.40
  6. Step 6: Final answer
    x = 115,432.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.