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Finding the Fourth Proportional to 65,718.90, 98,554.05 and 21,347.10

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Solution

The fourth proportional to 65,718.90, 98,554.05 and 21,347.10 is: 32,012.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,718.90 : 98,554.05 = 21,347.10 : x
  2. Step 2: Convert to fraction form
    65,718.90/98,554.05 = 21,347.10/x
  3. Step 3: Cross multiply
    65,718.90x = 98,554.05 × 21,347.10
  4. Step 4: Simplify right side
    65,718.90x = 2,103,843,160.76
  5. Step 5: Solve for x
    x = 2,103,843,160.76/65,718.90
  6. Step 6: Final answer
    x = 32,012.76

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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.