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Finding the Fourth Proportional to 65,711.21, 90,681.41 and 35,496.53

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Solution

The fourth proportional to 65,711.21, 90,681.41 and 35,496.53 is: 48,985.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,711.21 : 90,681.41 = 35,496.53 : x
  2. Step 2: Convert to fraction form
    65,711.21/90,681.41 = 35,496.53/x
  3. Step 3: Cross multiply
    65,711.21x = 90,681.41 × 35,496.53
  4. Step 4: Simplify right side
    65,711.21x = 3,218,874,759.62
  5. Step 5: Solve for x
    x = 3,218,874,759.62/65,711.21
  6. Step 6: Final answer
    x = 48,985.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.