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Finding the Fourth Proportional to 85,671.90, 118,289.60 and 68,769.13

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Solution

The fourth proportional to 85,671.90, 118,289.60 and 68,769.13 is: 94,951.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,671.90 : 118,289.60 = 68,769.13 : x
  2. Step 2: Convert to fraction form
    85,671.90/118,289.60 = 68,769.13/x
  3. Step 3: Cross multiply
    85,671.90x = 118,289.60 × 68,769.13
  4. Step 4: Simplify right side
    85,671.90x = 8,134,672,498.36
  5. Step 5: Solve for x
    x = 8,134,672,498.36/85,671.90
  6. Step 6: Final answer
    x = 94,951.46

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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.