Home / 90,500.12-124,447.29-78,542.70

Finding the Fourth Proportional to 90,500.12, 124,447.29 and 78,542.70

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Solution

The fourth proportional to 90,500.12, 124,447.29 and 78,542.70 is: 108,004.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,500.12 : 124,447.29 = 78,542.70 : x
  2. Step 2: Convert to fraction form
    90,500.12/124,447.29 = 78,542.70/x
  3. Step 3: Cross multiply
    90,500.12x = 124,447.29 × 78,542.70
  4. Step 4: Simplify right side
    90,500.12x = 9,774,425,403.07
  5. Step 5: Solve for x
    x = 9,774,425,403.07/90,500.12
  6. Step 6: Final answer
    x = 108,004.56

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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.