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Finding the Fourth Proportional to 65,321.40, 97,787.70 and 43,159.80

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Solution

The fourth proportional to 65,321.40, 97,787.70 and 43,159.80 is: 64,611.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,321.40 : 97,787.70 = 43,159.80 : x
  2. Step 2: Convert to fraction form
    65,321.40/97,787.70 = 43,159.80/x
  3. Step 3: Cross multiply
    65,321.40x = 97,787.70 × 43,159.80
  4. Step 4: Simplify right side
    65,321.40x = 4,220,497,574.46
  5. Step 5: Solve for x
    x = 4,220,497,574.46/65,321.40
  6. Step 6: Final answer
    x = 64,611.25

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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.