Home / 72,144.75-99,559.45-40,313.65

Finding the Fourth Proportional to 72,144.75, 99,559.45 and 40,313.65

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Solution

The fourth proportional to 72,144.75, 99,559.45 and 40,313.65 is: 55,632.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,144.75 : 99,559.45 = 40,313.65 : x
  2. Step 2: Convert to fraction form
    72,144.75/99,559.45 = 40,313.65/x
  3. Step 3: Cross multiply
    72,144.75x = 99,559.45 × 40,313.65
  4. Step 4: Simplify right side
    72,144.75x = 4,013,604,471.81
  5. Step 5: Solve for x
    x = 4,013,604,471.81/72,144.75
  6. Step 6: Final answer
    x = 55,632.66

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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.