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Finding the Fourth Proportional to 72,312.39, 99,765.81 and 43,620.57

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Solution

The fourth proportional to 72,312.39, 99,765.81 and 43,620.57 is: 60,181.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,312.39 : 99,765.81 = 43,620.57 : x
  2. Step 2: Convert to fraction form
    72,312.39/99,765.81 = 43,620.57/x
  3. Step 3: Cross multiply
    72,312.39x = 99,765.81 × 43,620.57
  4. Step 4: Simplify right side
    72,312.39x = 4,351,841,498.71
  5. Step 5: Solve for x
    x = 4,351,841,498.71/72,312.39
  6. Step 6: Final answer
    x = 60,181.13

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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.