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Finding the Fourth Proportional to 136,899.60, 205,320.60 and 58,016.40

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Solution

The fourth proportional to 136,899.60, 205,320.60 and 58,016.40 is: 87,012.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,899.60 : 205,320.60 = 58,016.40 : x
  2. Step 2: Convert to fraction form
    136,899.60/205,320.60 = 58,016.40/x
  3. Step 3: Cross multiply
    136,899.60x = 205,320.60 × 58,016.40
  4. Step 4: Simplify right side
    136,899.60x = 11,911,962,057.84
  5. Step 5: Solve for x
    x = 11,911,962,057.84/136,899.60
  6. Step 6: Final answer
    x = 87,012.39

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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.