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Finding the Fourth Proportional to 65,680.84, 98,535.66 and 21,312.08

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Solution

The fourth proportional to 65,680.84, 98,535.66 and 21,312.08 is: 31,972.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,680.84 : 98,535.66 = 21,312.08 : x
  2. Step 2: Convert to fraction form
    65,680.84/98,535.66 = 21,312.08/x
  3. Step 3: Cross multiply
    65,680.84x = 98,535.66 × 21,312.08
  4. Step 4: Simplify right side
    65,680.84x = 2,099,999,868.77
  5. Step 5: Solve for x
    x = 2,099,999,868.77/65,680.84
  6. Step 6: Final answer
    x = 31,972.79

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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.