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Finding the Fourth Proportional to 72,398.61, 99,914.04 and 40,577.76

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Solution

The fourth proportional to 72,398.61, 99,914.04 and 40,577.76 is: 55,999.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,398.61 : 99,914.04 = 40,577.76 : x
  2. Step 2: Convert to fraction form
    72,398.61/99,914.04 = 40,577.76/x
  3. Step 3: Cross multiply
    72,398.61x = 99,914.04 × 40,577.76
  4. Step 4: Simplify right side
    72,398.61x = 4,054,287,935.75
  5. Step 5: Solve for x
    x = 4,054,287,935.75/72,398.61
  6. Step 6: Final answer
    x = 55,999.53

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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.