Home / 90,531.30-124,490.07-78,573.81

Finding the Fourth Proportional to 90,531.30, 124,490.07 and 78,573.81

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Solution

The fourth proportional to 90,531.30, 124,490.07 and 78,573.81 is: 108,047.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,531.30 : 124,490.07 = 78,573.81 : x
  2. Step 2: Convert to fraction form
    90,531.30/124,490.07 = 78,573.81/x
  3. Step 3: Cross multiply
    90,531.30x = 124,490.07 × 78,573.81
  4. Step 4: Simplify right side
    90,531.30x = 9,781,659,107.07
  5. Step 5: Solve for x
    x = 9,781,659,107.07/90,531.30
  6. Step 6: Final answer
    x = 108,047.26

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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.