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Finding the Fourth Proportional to 118,091.70, 176,705.55 and 86,987.70

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Solution

The fourth proportional to 118,091.70, 176,705.55 and 86,987.70 is: 130,163.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,091.70 : 176,705.55 = 86,987.70 : x
  2. Step 2: Convert to fraction form
    118,091.70/176,705.55 = 86,987.70/x
  3. Step 3: Cross multiply
    118,091.70x = 176,705.55 × 86,987.70
  4. Step 4: Simplify right side
    118,091.70x = 15,371,209,371.74
  5. Step 5: Solve for x
    x = 15,371,209,371.74/118,091.70
  6. Step 6: Final answer
    x = 130,163.33

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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.