Home / 137,976.80-206,965.20-90,737.60

Finding the Fourth Proportional to 137,976.80, 206,965.20 and 90,737.60

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Solution

The fourth proportional to 137,976.80, 206,965.20 and 90,737.60 is: 136,106.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,976.80 : 206,965.20 = 90,737.60 : x
  2. Step 2: Convert to fraction form
    137,976.80/206,965.20 = 90,737.60/x
  3. Step 3: Cross multiply
    137,976.80x = 206,965.20 × 90,737.60
  4. Step 4: Simplify right side
    137,976.80x = 18,779,525,531.52
  5. Step 5: Solve for x
    x = 18,779,525,531.52/137,976.80
  6. Step 6: Final answer
    x = 136,106.40

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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.