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Finding the Fourth Proportional to 65,417.50, 90,287.93 and 38,558.44

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Solution

The fourth proportional to 65,417.50, 90,287.93 and 38,558.44 is: 53,217.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,417.50 : 90,287.93 = 38,558.44 : x
  2. Step 2: Convert to fraction form
    65,417.50/90,287.93 = 38,558.44/x
  3. Step 3: Cross multiply
    65,417.50x = 90,287.93 × 38,558.44
  4. Step 4: Simplify right side
    65,417.50x = 3,481,361,087.40
  5. Step 5: Solve for x
    x = 3,481,361,087.40/65,417.50
  6. Step 6: Final answer
    x = 53,217.58

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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.