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Finding the Fourth Proportional to 85,154.70, 117,560.70 and 51,171.54

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Solution

The fourth proportional to 85,154.70, 117,560.70 and 51,171.54 is: 70,645.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,154.70 : 117,560.70 = 51,171.54 : x
  2. Step 2: Convert to fraction form
    85,154.70/117,560.70 = 51,171.54/x
  3. Step 3: Cross multiply
    85,154.70x = 117,560.70 × 51,171.54
  4. Step 4: Simplify right side
    85,154.70x = 6,015,762,062.48
  5. Step 5: Solve for x
    x = 6,015,762,062.48/85,154.70
  6. Step 6: Final answer
    x = 70,645.10

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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.