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Finding the Fourth Proportional to 65,776.22, 90,749.72 and 40,256.02

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Solution

The fourth proportional to 65,776.22, 90,749.72 and 40,256.02 is: 55,540.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,776.22 : 90,749.72 = 40,256.02 : x
  2. Step 2: Convert to fraction form
    65,776.22/90,749.72 = 40,256.02/x
  3. Step 3: Cross multiply
    65,776.22x = 90,749.72 × 40,256.02
  4. Step 4: Simplify right side
    65,776.22x = 3,653,221,888.29
  5. Step 5: Solve for x
    x = 3,653,221,888.29/65,776.22
  6. Step 6: Final answer
    x = 55,540.17

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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.