Home / 72,171.12-99,589.28-40,339.28

Finding the Fourth Proportional to 72,171.12, 99,589.28 and 40,339.28

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Solution

The fourth proportional to 72,171.12, 99,589.28 and 40,339.28 is: 55,664.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,171.12 : 99,589.28 = 40,339.28 : x
  2. Step 2: Convert to fraction form
    72,171.12/99,589.28 = 40,339.28/x
  3. Step 3: Cross multiply
    72,171.12x = 99,589.28 × 40,339.28
  4. Step 4: Simplify right side
    72,171.12x = 4,017,359,850.92
  5. Step 5: Solve for x
    x = 4,017,359,850.92/72,171.12
  6. Step 6: Final answer
    x = 55,664.37

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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.