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Finding the Fourth Proportional to 136,869.60, 205,285.20 and 43,384.80

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Solution

The fourth proportional to 136,869.60, 205,285.20 and 43,384.80 is: 65,071.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,869.60 : 205,285.20 = 43,384.80 : x
  2. Step 2: Convert to fraction form
    136,869.60/205,285.20 = 43,384.80/x
  3. Step 3: Cross multiply
    136,869.60x = 205,285.20 × 43,384.80
  4. Step 4: Simplify right side
    136,869.60x = 8,906,257,344.96
  5. Step 5: Solve for x
    x = 8,906,257,344.96/136,869.60
  6. Step 6: Final answer
    x = 65,071.11

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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.