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Finding the Fourth Proportional to 72,195.16, 99,617.16 and 40,364.32

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Solution

The fourth proportional to 72,195.16, 99,617.16 and 40,364.32 is: 55,695.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,195.16 : 99,617.16 = 40,364.32 : x
  2. Step 2: Convert to fraction form
    72,195.16/99,617.16 = 40,364.32/x
  3. Step 3: Cross multiply
    72,195.16x = 99,617.16 × 40,364.32
  4. Step 4: Simplify right side
    72,195.16x = 4,020,978,923.73
  5. Step 5: Solve for x
    x = 4,020,978,923.73/72,195.16
  6. Step 6: Final answer
    x = 55,695.96

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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.