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Finding the Fourth Proportional to 85,317.36, 127,921.35 and 35,431.89

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Solution

The fourth proportional to 85,317.36, 127,921.35 and 35,431.89 is: 53,125.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,317.36 : 127,921.35 = 35,431.89 : x
  2. Step 2: Convert to fraction form
    85,317.36/127,921.35 = 35,431.89/x
  3. Step 3: Cross multiply
    85,317.36x = 127,921.35 × 35,431.89
  4. Step 4: Simplify right side
    85,317.36x = 4,532,495,201.85
  5. Step 5: Solve for x
    x = 4,532,495,201.85/85,317.36
  6. Step 6: Final answer
    x = 53,125.12

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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.