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Finding the Fourth Proportional to 65,695.51, 98,480.91 and 21,291.05

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Solution

The fourth proportional to 65,695.51, 98,480.91 and 21,291.05 is: 31,916.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,695.51 : 98,480.91 = 21,291.05 : x
  2. Step 2: Convert to fraction form
    65,695.51/98,480.91 = 21,291.05/x
  3. Step 3: Cross multiply
    65,695.51x = 98,480.91 × 21,291.05
  4. Step 4: Simplify right side
    65,695.51x = 2,096,762,304.90
  5. Step 5: Solve for x
    x = 2,096,762,304.90/65,695.51
  6. Step 6: Final answer
    x = 31,916.37

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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.