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Finding the Fourth Proportional to 65,481.91, 90,407.40 and 51,116.96

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Solution

The fourth proportional to 65,481.91, 90,407.40 and 51,116.96 is: 70,574.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,481.91 : 90,407.40 = 51,116.96 : x
  2. Step 2: Convert to fraction form
    65,481.91/90,407.40 = 51,116.96/x
  3. Step 3: Cross multiply
    65,481.91x = 90,407.40 × 51,116.96
  4. Step 4: Simplify right side
    65,481.91x = 4,621,351,449.50
  5. Step 5: Solve for x
    x = 4,621,351,449.50/65,481.91
  6. Step 6: Final answer
    x = 70,574.48

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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.