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Finding the Fourth Proportional to 90,813.76, 125,323.12 and 51,069.76

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Solution

The fourth proportional to 90,813.76, 125,323.12 and 51,069.76 is: 70,476.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,813.76 : 125,323.12 = 51,069.76 : x
  2. Step 2: Convert to fraction form
    90,813.76/125,323.12 = 51,069.76/x
  3. Step 3: Cross multiply
    90,813.76x = 125,323.12 × 51,069.76
  4. Step 4: Simplify right side
    90,813.76x = 6,400,221,660.85
  5. Step 5: Solve for x
    x = 6,400,221,660.85/90,813.76
  6. Step 6: Final answer
    x = 70,476.34

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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.