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Finding the Fourth Proportional to 72,244.72, 99,693.84 and 39,977.92

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Solution

The fourth proportional to 72,244.72, 99,693.84 and 39,977.92 is: 55,167.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,244.72 : 99,693.84 = 39,977.92 : x
  2. Step 2: Convert to fraction form
    72,244.72/99,693.84 = 39,977.92/x
  3. Step 3: Cross multiply
    72,244.72x = 99,693.84 × 39,977.92
  4. Step 4: Simplify right side
    72,244.72x = 3,985,552,360.01
  5. Step 5: Solve for x
    x = 3,985,552,360.01/72,244.72
  6. Step 6: Final answer
    x = 55,167.39

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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.