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Finding the Fourth Proportional to 118,758.36, 178,139.77 and 55,543.54

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Solution

The fourth proportional to 118,758.36, 178,139.77 and 55,543.54 is: 83,316.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,758.36 : 178,139.77 = 55,543.54 : x
  2. Step 2: Convert to fraction form
    118,758.36/178,139.77 = 55,543.54/x
  3. Step 3: Cross multiply
    118,758.36x = 178,139.77 × 55,543.54
  4. Step 4: Simplify right side
    118,758.36x = 9,894,513,440.59
  5. Step 5: Solve for x
    x = 9,894,513,440.59/118,758.36
  6. Step 6: Final answer
    x = 83,316.35

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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.