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Finding the Fourth Proportional to 64,751.16, 89,407.28 and 50,644.20

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Solution

The fourth proportional to 64,751.16, 89,407.28 and 50,644.20 is: 69,928.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,751.16 : 89,407.28 = 50,644.20 : x
  2. Step 2: Convert to fraction form
    64,751.16/89,407.28 = 50,644.20/x
  3. Step 3: Cross multiply
    64,751.16x = 89,407.28 × 50,644.20
  4. Step 4: Simplify right side
    64,751.16x = 4,527,960,169.78
  5. Step 5: Solve for x
    x = 4,527,960,169.78/64,751.16
  6. Step 6: Final answer
    x = 69,928.63

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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.