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Finding the Fourth Proportional to 136,699.80, 205,049.70 and 89,461.40

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Solution

The fourth proportional to 136,699.80, 205,049.70 and 89,461.40 is: 134,192.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,699.80 : 205,049.70 = 89,461.40 : x
  2. Step 2: Convert to fraction form
    136,699.80/205,049.70 = 89,461.40/x
  3. Step 3: Cross multiply
    136,699.80x = 205,049.70 × 89,461.40
  4. Step 4: Simplify right side
    136,699.80x = 18,344,033,231.58
  5. Step 5: Solve for x
    x = 18,344,033,231.58/136,699.80
  6. Step 6: Final answer
    x = 134,192.10

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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.