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Finding the Fourth Proportional to 85,854.70, 128,749.65 and 35,938.27

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Solution

The fourth proportional to 85,854.70, 128,749.65 and 35,938.27 is: 53,893.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,854.70 : 128,749.65 = 35,938.27 : x
  2. Step 2: Convert to fraction form
    85,854.70/128,749.65 = 35,938.27/x
  3. Step 3: Cross multiply
    85,854.70x = 128,749.65 × 35,938.27
  4. Step 4: Simplify right side
    85,854.70x = 4,627,039,684.11
  5. Step 5: Solve for x
    x = 4,627,039,684.11/85,854.70
  6. Step 6: Final answer
    x = 53,893.84

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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.