Home / 72,145.49-99,558.87-40,314.65

Finding the Fourth Proportional to 72,145.49, 99,558.87 and 40,314.65

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Solution

The fourth proportional to 72,145.49, 99,558.87 and 40,314.65 is: 55,633.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,145.49 : 99,558.87 = 40,314.65 : x
  2. Step 2: Convert to fraction form
    72,145.49/99,558.87 = 40,314.65/x
  3. Step 3: Cross multiply
    72,145.49x = 99,558.87 × 40,314.65
  4. Step 4: Simplify right side
    72,145.49x = 4,013,681,146.56
  5. Step 5: Solve for x
    x = 4,013,681,146.56/72,145.49
  6. Step 6: Final answer
    x = 55,633.15

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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.