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Finding the Fourth Proportional to 65,216.80, 90,020.56 and 38,357.92

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Solution

The fourth proportional to 65,216.80, 90,020.56 and 38,357.92 is: 52,946.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,216.80 : 90,020.56 = 38,357.92 : x
  2. Step 2: Convert to fraction form
    65,216.80/90,020.56 = 38,357.92/x
  3. Step 3: Cross multiply
    65,216.80x = 90,020.56 × 38,357.92
  4. Step 4: Simplify right side
    65,216.80x = 3,453,001,438.84
  5. Step 5: Solve for x
    x = 3,453,001,438.84/65,216.80
  6. Step 6: Final answer
    x = 52,946.50

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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.