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Finding the Fourth Proportional to 85,671.78, 118,220.49 and 47,940.90

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Solution

The fourth proportional to 85,671.78, 118,220.49 and 47,940.90 is: 66,154.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,671.78 : 118,220.49 = 47,940.90 : x
  2. Step 2: Convert to fraction form
    85,671.78/118,220.49 = 47,940.90/x
  3. Step 3: Cross multiply
    85,671.78x = 118,220.49 × 47,940.90
  4. Step 4: Simplify right side
    85,671.78x = 5,667,596,689.04
  5. Step 5: Solve for x
    x = 5,667,596,689.04/85,671.78
  6. Step 6: Final answer
    x = 66,154.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.