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Finding the Fourth Proportional to 72,225.31, 99,671.17 and 40,392.16

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Solution

The fourth proportional to 72,225.31, 99,671.17 and 40,392.16 is: 55,741.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,225.31 : 99,671.17 = 40,392.16 : x
  2. Step 2: Convert to fraction form
    72,225.31/99,671.17 = 40,392.16/x
  3. Step 3: Cross multiply
    72,225.31x = 99,671.17 × 40,392.16
  4. Step 4: Simplify right side
    72,225.31x = 4,025,933,846.03
  5. Step 5: Solve for x
    x = 4,025,933,846.03/72,225.31
  6. Step 6: Final answer
    x = 55,741.32

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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.