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Finding the Fourth Proportional to 90,859.64, 125,386.31 and 50,572.54

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Solution

The fourth proportional to 90,859.64, 125,386.31 and 50,572.54 is: 69,790.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,859.64 : 125,386.31 = 50,572.54 : x
  2. Step 2: Convert to fraction form
    90,859.64/125,386.31 = 50,572.54/x
  3. Step 3: Cross multiply
    90,859.64x = 125,386.31 × 50,572.54
  4. Step 4: Simplify right side
    90,859.64x = 6,341,103,581.30
  5. Step 5: Solve for x
    x = 6,341,103,581.30/90,859.64
  6. Step 6: Final answer
    x = 69,790.10

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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.