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Finding the Fourth Proportional to 136,937.60, 188,872.80 and 86,588

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Solution

The fourth proportional to 136,937.60, 188,872.80 and 86,588 is: 119,427.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,937.60 : 188,872.80 = 86,588 : x
  2. Step 2: Convert to fraction form
    136,937.60/188,872.80 = 86,588/x
  3. Step 3: Cross multiply
    136,937.60x = 188,872.80 × 86,588
  4. Step 4: Simplify right side
    136,937.60x = 16,354,118,006.40
  5. Step 5: Solve for x
    x = 16,354,118,006.40/136,937.60
  6. Step 6: Final answer
    x = 119,427.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.