Home / 72,199.27-99,639.39-40,370.32

Finding the Fourth Proportional to 72,199.27, 99,639.39 and 40,370.32

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Solution

The fourth proportional to 72,199.27, 99,639.39 and 40,370.32 is: 55,713.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,199.27 : 99,639.39 = 40,370.32 : x
  2. Step 2: Convert to fraction form
    72,199.27/99,639.39 = 40,370.32/x
  3. Step 3: Cross multiply
    72,199.27x = 99,639.39 × 40,370.32
  4. Step 4: Simplify right side
    72,199.27x = 4,022,474,058.90
  5. Step 5: Solve for x
    x = 4,022,474,058.90/72,199.27
  6. Step 6: Final answer
    x = 55,713.50

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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.