Home / 120,726.40-180,943.80-61,531.60

Finding the Fourth Proportional to 120,726.40, 180,943.80 and 61,531.60

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Solution

The fourth proportional to 120,726.40, 180,943.80 and 61,531.60 is: 92,223.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,726.40 : 180,943.80 = 61,531.60 : x
  2. Step 2: Convert to fraction form
    120,726.40/180,943.80 = 61,531.60/x
  3. Step 3: Cross multiply
    120,726.40x = 180,943.80 × 61,531.60
  4. Step 4: Simplify right side
    120,726.40x = 11,133,761,524.08
  5. Step 5: Solve for x
    x = 11,133,761,524.08/120,726.40
  6. Step 6: Final answer
    x = 92,223.09

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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.