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Finding the Fourth Proportional to 72,335.01, 99,819.99 and 40,068.30

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Solution

The fourth proportional to 72,335.01, 99,819.99 and 40,068.30 is: 55,292.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,335.01 : 99,819.99 = 40,068.30 : x
  2. Step 2: Convert to fraction form
    72,335.01/99,819.99 = 40,068.30/x
  3. Step 3: Cross multiply
    72,335.01x = 99,819.99 × 40,068.30
  4. Step 4: Simplify right side
    72,335.01x = 3,999,617,305.32
  5. Step 5: Solve for x
    x = 3,999,617,305.32/72,335.01
  6. Step 6: Final answer
    x = 55,292.97

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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.