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Finding the Fourth Proportional to 136,810.70, 204,870.45 and 89,809.10

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Solution

The fourth proportional to 136,810.70, 204,870.45 and 89,809.10 is: 134,486.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,810.70 : 204,870.45 = 89,809.10 : x
  2. Step 2: Convert to fraction form
    136,810.70/204,870.45 = 89,809.10/x
  3. Step 3: Cross multiply
    136,810.70x = 204,870.45 × 89,809.10
  4. Step 4: Simplify right side
    136,810.70x = 18,399,230,731.10
  5. Step 5: Solve for x
    x = 18,399,230,731.10/136,810.70
  6. Step 6: Final answer
    x = 134,486.78

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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.