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Finding the Fourth Proportional to 65,521.56, 98,290.98 and 21,133.72

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Solution

The fourth proportional to 65,521.56, 98,290.98 and 21,133.72 is: 31,703.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,521.56 : 98,290.98 = 21,133.72 : x
  2. Step 2: Convert to fraction form
    65,521.56/98,290.98 = 21,133.72/x
  3. Step 3: Cross multiply
    65,521.56x = 98,290.98 × 21,133.72
  4. Step 4: Simplify right side
    65,521.56x = 2,077,254,049.85
  5. Step 5: Solve for x
    x = 2,077,254,049.85/65,521.56
  6. Step 6: Final answer
    x = 31,703.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.