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Finding the Fourth Proportional to 137,154.80, 189,311.70 and 79,805.20

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Solution

The fourth proportional to 137,154.80, 189,311.70 and 79,805.20 is: 110,153.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,154.80 : 189,311.70 = 79,805.20 : x
  2. Step 2: Convert to fraction form
    137,154.80/189,311.70 = 79,805.20/x
  3. Step 3: Cross multiply
    137,154.80x = 189,311.70 × 79,805.20
  4. Step 4: Simplify right side
    137,154.80x = 15,108,058,080.84
  5. Step 5: Solve for x
    x = 15,108,058,080.84/137,154.80
  6. Step 6: Final answer
    x = 110,153.33

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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.