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Finding the Fourth Proportional to 104,038.40, 155,793.60 and 57,238.40

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Solution

The fourth proportional to 104,038.40, 155,793.60 and 57,238.40 is: 85,712.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,038.40 : 155,793.60 = 57,238.40 : x
  2. Step 2: Convert to fraction form
    104,038.40/155,793.60 = 57,238.40/x
  3. Step 3: Cross multiply
    104,038.40x = 155,793.60 × 57,238.40
  4. Step 4: Simplify right side
    104,038.40x = 8,917,376,394.24
  5. Step 5: Solve for x
    x = 8,917,376,394.24/104,038.40
  6. Step 6: Final answer
    x = 85,712.36

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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.