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Finding the Fourth Proportional to 137,095.44, 189,115.72 and 79,728.48

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Solution

The fourth proportional to 137,095.44, 189,115.72 and 79,728.48 is: 109,981.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,095.44 : 189,115.72 = 79,728.48 : x
  2. Step 2: Convert to fraction form
    137,095.44/189,115.72 = 79,728.48/x
  3. Step 3: Cross multiply
    137,095.44x = 189,115.72 × 79,728.48
  4. Step 4: Simplify right side
    137,095.44x = 15,077,908,899.71
  5. Step 5: Solve for x
    x = 15,077,908,899.71/137,095.44
  6. Step 6: Final answer
    x = 109,981.11

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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.