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Finding the Fourth Proportional to 71,769.68, 99,042.72 and 43,455.68

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Solution

The fourth proportional to 71,769.68, 99,042.72 and 43,455.68 is: 59,969.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,769.68 : 99,042.72 = 43,455.68 : x
  2. Step 2: Convert to fraction form
    71,769.68/99,042.72 = 43,455.68/x
  3. Step 3: Cross multiply
    71,769.68x = 99,042.72 × 43,455.68
  4. Step 4: Simplify right side
    71,769.68x = 4,303,968,746.65
  5. Step 5: Solve for x
    x = 4,303,968,746.65/71,769.68
  6. Step 6: Final answer
    x = 59,969.18

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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.