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Finding the Fourth Proportional to 90,903, 125,455.86 and 53,208.84

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Solution

The fourth proportional to 90,903, 125,455.86 and 53,208.84 is: 73,433.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,903 : 125,455.86 = 53,208.84 : x
  2. Step 2: Convert to fraction form
    90,903/125,455.86 = 53,208.84/x
  3. Step 3: Cross multiply
    90,903x = 125,455.86 × 53,208.84
  4. Step 4: Simplify right side
    90,903x = 6,675,360,781.80
  5. Step 5: Solve for x
    x = 6,675,360,781.80/90,903
  6. Step 6: Final answer
    x = 73,433.89

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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.