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Finding the Fourth Proportional to 272,366.66, 408,615.59 and 85,378.16

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Solution

The fourth proportional to 272,366.66, 408,615.59 and 85,378.16 is: 128,087.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,366.66 : 408,615.59 = 85,378.16 : x
  2. Step 2: Convert to fraction form
    272,366.66/408,615.59 = 85,378.16/x
  3. Step 3: Cross multiply
    272,366.66x = 408,615.59 × 85,378.16
  4. Step 4: Simplify right side
    272,366.66x = 34,886,845,391.88
  5. Step 5: Solve for x
    x = 34,886,845,391.88/272,366.66
  6. Step 6: Final answer
    x = 128,087.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.