Home / 72,187.43-99,618.88-40,356.33

Finding the Fourth Proportional to 72,187.43, 99,618.88 and 40,356.33

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Solution

The fourth proportional to 72,187.43, 99,618.88 and 40,356.33 is: 55,691.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,187.43 : 99,618.88 = 40,356.33 : x
  2. Step 2: Convert to fraction form
    72,187.43/99,618.88 = 40,356.33/x
  3. Step 3: Cross multiply
    72,187.43x = 99,618.88 × 40,356.33
  4. Step 4: Simplify right side
    72,187.43x = 4,020,252,141.66
  5. Step 5: Solve for x
    x = 4,020,252,141.66/72,187.43
  6. Step 6: Final answer
    x = 55,691.86

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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.