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Finding the Fourth Proportional to 65,688.84, 98,521.92 and 21,347.28

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Solution

The fourth proportional to 65,688.84, 98,521.92 and 21,347.28 is: 32,017.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,688.84 : 98,521.92 = 21,347.28 : x
  2. Step 2: Convert to fraction form
    65,688.84/98,521.92 = 21,347.28/x
  3. Step 3: Cross multiply
    65,688.84x = 98,521.92 × 21,347.28
  4. Step 4: Simplify right side
    65,688.84x = 2,103,175,012.38
  5. Step 5: Solve for x
    x = 2,103,175,012.38/65,688.84
  6. Step 6: Final answer
    x = 32,017.23

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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.