Home / 103,553.28-142,941.67-90,940.79

Finding the Fourth Proportional to 103,553.28, 142,941.67 and 90,940.79

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Solution

The fourth proportional to 103,553.28, 142,941.67 and 90,940.79 is: 125,531.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,553.28 : 142,941.67 = 90,940.79 : x
  2. Step 2: Convert to fraction form
    103,553.28/142,941.67 = 90,940.79/x
  3. Step 3: Cross multiply
    103,553.28x = 142,941.67 × 90,940.79
  4. Step 4: Simplify right side
    103,553.28x = 12,999,228,523.72
  5. Step 5: Solve for x
    x = 12,999,228,523.72/103,553.28
  6. Step 6: Final answer
    x = 125,531.79

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1.5x scale

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.