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Finding the Fourth Proportional to 64,969.76, 89,631.12 and 43,712.12

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Solution

The fourth proportional to 64,969.76, 89,631.12 and 43,712.12 is: 60,304.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,969.76 : 89,631.12 = 43,712.12 : x
  2. Step 2: Convert to fraction form
    64,969.76/89,631.12 = 43,712.12/x
  3. Step 3: Cross multiply
    64,969.76x = 89,631.12 × 43,712.12
  4. Step 4: Simplify right side
    64,969.76x = 3,917,966,273.17
  5. Step 5: Solve for x
    x = 3,917,966,273.17/64,969.76
  6. Step 6: Final answer
    x = 60,304.46

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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.