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Finding the Fourth Proportional to 157,140.78, 216,850.08 and 85,519.26

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Solution

The fourth proportional to 157,140.78, 216,850.08 and 85,519.26 is: 118,014.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,140.78 : 216,850.08 = 85,519.26 : x
  2. Step 2: Convert to fraction form
    157,140.78/216,850.08 = 85,519.26/x
  3. Step 3: Cross multiply
    157,140.78x = 216,850.08 × 85,519.26
  4. Step 4: Simplify right side
    157,140.78x = 18,544,858,372.54
  5. Step 5: Solve for x
    x = 18,544,858,372.54/157,140.78
  6. Step 6: Final answer
    x = 118,014.30

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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.