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Finding the Fourth Proportional to 137,349.14, 189,520.16 and 79,997.90

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Solution

The fourth proportional to 137,349.14, 189,520.16 and 79,997.90 is: 110,384.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,349.14 : 189,520.16 = 79,997.90 : x
  2. Step 2: Convert to fraction form
    137,349.14/189,520.16 = 79,997.90/x
  3. Step 3: Cross multiply
    137,349.14x = 189,520.16 × 79,997.90
  4. Step 4: Simplify right side
    137,349.14x = 15,161,213,460.07
  5. Step 5: Solve for x
    x = 15,161,213,460.07/137,349.14
  6. Step 6: Final answer
    x = 110,384.48

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1.5x scale

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.