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Finding the Fourth Proportional to 178,818, 267,818.76 and 85,389.36

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Solution

The fourth proportional to 178,818, 267,818.76 and 85,389.36 is: 127,889.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,818 : 267,818.76 = 85,389.36 : x
  2. Step 2: Convert to fraction form
    178,818/267,818.76 = 85,389.36/x
  3. Step 3: Cross multiply
    178,818x = 267,818.76 × 85,389.36
  4. Step 4: Simplify right side
    178,818x = 22,868,872,512.39
  5. Step 5: Solve for x
    x = 22,868,872,512.39/178,818
  6. Step 6: Final answer
    x = 127,889.10

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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.