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Finding the Fourth Proportional to 118,363.20, 177,112.80 and 87,259.20

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Solution

The fourth proportional to 118,363.20, 177,112.80 and 87,259.20 is: 130,570.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,363.20 : 177,112.80 = 87,259.20 : x
  2. Step 2: Convert to fraction form
    118,363.20/177,112.80 = 87,259.20/x
  3. Step 3: Cross multiply
    118,363.20x = 177,112.80 × 87,259.20
  4. Step 4: Simplify right side
    118,363.20x = 15,454,721,237.76
  5. Step 5: Solve for x
    x = 15,454,721,237.76/118,363.20
  6. Step 6: Final answer
    x = 130,570.32

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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.