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Finding the Fourth Proportional to 103,771.70, 155,657.55 and 61,781.30

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Solution

The fourth proportional to 103,771.70, 155,657.55 and 61,781.30 is: 92,671.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,771.70 : 155,657.55 = 61,781.30 : x
  2. Step 2: Convert to fraction form
    103,771.70/155,657.55 = 61,781.30/x
  3. Step 3: Cross multiply
    103,771.70x = 155,657.55 × 61,781.30
  4. Step 4: Simplify right side
    103,771.70x = 9,616,725,793.82
  5. Step 5: Solve for x
    x = 9,616,725,793.82/103,771.70
  6. Step 6: Final answer
    x = 92,671.95

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1.5x scale

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.