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Finding the Fourth Proportional to 134,311.80, 201,294.90 and 81,665.40

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Solution

The fourth proportional to 134,311.80, 201,294.90 and 81,665.40 is: 122,393.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,311.80 : 201,294.90 = 81,665.40 : x
  2. Step 2: Convert to fraction form
    134,311.80/201,294.90 = 81,665.40/x
  3. Step 3: Cross multiply
    134,311.80x = 201,294.90 × 81,665.40
  4. Step 4: Simplify right side
    134,311.80x = 16,438,828,526.46
  5. Step 5: Solve for x
    x = 16,438,828,526.46/134,311.80
  6. Step 6: Final answer
    x = 122,393.03

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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.