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Finding the Fourth Proportional to 72,402.22, 99,913.44 and 42,185.65

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Solution

The fourth proportional to 72,402.22, 99,913.44 and 42,185.65 is: 58,215.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,402.22 : 99,913.44 = 42,185.65 : x
  2. Step 2: Convert to fraction form
    72,402.22/99,913.44 = 42,185.65/x
  3. Step 3: Cross multiply
    72,402.22x = 99,913.44 × 42,185.65
  4. Step 4: Simplify right side
    72,402.22x = 4,214,913,410.14
  5. Step 5: Solve for x
    x = 4,214,913,410.14/72,402.22
  6. Step 6: Final answer
    x = 58,215.25

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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.