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Finding the Fourth Proportional to 219,600.80, 329,708.40 and 136,656.80

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Solution

The fourth proportional to 219,600.80, 329,708.40 and 136,656.80 is: 205,176.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,600.80 : 329,708.40 = 136,656.80 : x
  2. Step 2: Convert to fraction form
    219,600.80/329,708.40 = 136,656.80/x
  3. Step 3: Cross multiply
    219,600.80x = 329,708.40 × 136,656.80
  4. Step 4: Simplify right side
    219,600.80x = 45,056,894,877.12
  5. Step 5: Solve for x
    x = 45,056,894,877.12/219,600.80
  6. Step 6: Final answer
    x = 205,176.37

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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.