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Finding the Fourth Proportional to 64,988.04, 89,689.53 and 39,488.54

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Solution

The fourth proportional to 64,988.04, 89,689.53 and 39,488.54 is: 54,497.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,988.04 : 89,689.53 = 39,488.54 : x
  2. Step 2: Convert to fraction form
    64,988.04/89,689.53 = 39,488.54/x
  3. Step 3: Cross multiply
    64,988.04x = 89,689.53 × 39,488.54
  4. Step 4: Simplify right side
    64,988.04x = 3,541,708,144.54
  5. Step 5: Solve for x
    x = 3,541,708,144.54/64,988.04
  6. Step 6: Final answer
    x = 54,497.85

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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.