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Finding the Fourth Proportional to 72,029.98, 99,398.96 and 39,764.08

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Solution

The fourth proportional to 72,029.98, 99,398.96 and 39,764.08 is: 54,873.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,029.98 : 99,398.96 = 39,764.08 : x
  2. Step 2: Convert to fraction form
    72,029.98/99,398.96 = 39,764.08/x
  3. Step 3: Cross multiply
    72,029.98x = 99,398.96 × 39,764.08
  4. Step 4: Simplify right side
    72,029.98x = 3,952,508,207.25
  5. Step 5: Solve for x
    x = 3,952,508,207.25/72,029.98
  6. Step 6: Final answer
    x = 54,873.10

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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.