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Finding the Fourth Proportional to 65,759.04, 98,661.47 and 20,787.28

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Solution

The fourth proportional to 65,759.04, 98,661.47 and 20,787.28 is: 31,188.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,759.04 : 98,661.47 = 20,787.28 : x
  2. Step 2: Convert to fraction form
    65,759.04/98,661.47 = 20,787.28/x
  3. Step 3: Cross multiply
    65,759.04x = 98,661.47 × 20,787.28
  4. Step 4: Simplify right side
    65,759.04x = 2,050,903,251.51
  5. Step 5: Solve for x
    x = 2,050,903,251.51/65,759.04
  6. Step 6: Final answer
    x = 31,188.16

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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.