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Finding the Fourth Proportional to 92,842.20, 139,263.30 and 86,937.30

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Solution

The fourth proportional to 92,842.20, 139,263.30 and 86,937.30 is: 130,405.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,842.20 : 139,263.30 = 86,937.30 : x
  2. Step 2: Convert to fraction form
    92,842.20/139,263.30 = 86,937.30/x
  3. Step 3: Cross multiply
    92,842.20x = 139,263.30 × 86,937.30
  4. Step 4: Simplify right side
    92,842.20x = 12,107,175,291.09
  5. Step 5: Solve for x
    x = 12,107,175,291.09/92,842.20
  6. Step 6: Final answer
    x = 130,405.95

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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.