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Finding the Fourth Proportional to 113,885.20, 170,827.80 and 61,397.20

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Solution

The fourth proportional to 113,885.20, 170,827.80 and 61,397.20 is: 92,095.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,885.20 : 170,827.80 = 61,397.20 : x
  2. Step 2: Convert to fraction form
    113,885.20/170,827.80 = 61,397.20/x
  3. Step 3: Cross multiply
    113,885.20x = 170,827.80 × 61,397.20
  4. Step 4: Simplify right side
    113,885.20x = 10,488,348,602.16
  5. Step 5: Solve for x
    x = 10,488,348,602.16/113,885.20
  6. Step 6: Final answer
    x = 92,095.80

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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.