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Finding the Fourth Proportional to 118,878.38, 178,275.06 and 55,687.70

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Solution

The fourth proportional to 118,878.38, 178,275.06 and 55,687.70 is: 83,511.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,878.38 : 178,275.06 = 55,687.70 : x
  2. Step 2: Convert to fraction form
    118,878.38/178,275.06 = 55,687.70/x
  3. Step 3: Cross multiply
    118,878.38x = 178,275.06 × 55,687.70
  4. Step 4: Simplify right side
    118,878.38x = 9,927,728,058.76
  5. Step 5: Solve for x
    x = 9,927,728,058.76/118,878.38
  6. Step 6: Final answer
    x = 83,511.64

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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.