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Finding the Fourth Proportional to 118,667.85, 178,124.87 and 79,498.68

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Solution

The fourth proportional to 118,667.85, 178,124.87 and 79,498.68 is: 119,330.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,667.85 : 178,124.87 = 79,498.68 : x
  2. Step 2: Convert to fraction form
    118,667.85/178,124.87 = 79,498.68/x
  3. Step 3: Cross multiply
    118,667.85x = 178,124.87 × 79,498.68
  4. Step 4: Simplify right side
    118,667.85x = 14,160,692,040.17
  5. Step 5: Solve for x
    x = 14,160,692,040.17/118,667.85
  6. Step 6: Final answer
    x = 119,330.48

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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.