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Finding the Fourth Proportional to 72,224.64, 99,671.04 and 40,394.88

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Solution

The fourth proportional to 72,224.64, 99,671.04 and 40,394.88 is: 55,745.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,224.64 : 99,671.04 = 40,394.88 : x
  2. Step 2: Convert to fraction form
    72,224.64/99,671.04 = 40,394.88/x
  3. Step 3: Cross multiply
    72,224.64x = 99,671.04 × 40,394.88
  4. Step 4: Simplify right side
    72,224.64x = 4,026,199,700.28
  5. Step 5: Solve for x
    x = 4,026,199,700.28/72,224.64
  6. Step 6: Final answer
    x = 55,745.51

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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.