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Finding the Fourth Proportional to 134,879.65, 186,019.64 and 81,154.63

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Solution

The fourth proportional to 134,879.65, 186,019.64 and 81,154.63 is: 111,924.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,879.65 : 186,019.64 = 81,154.63 : x
  2. Step 2: Convert to fraction form
    134,879.65/186,019.64 = 81,154.63/x
  3. Step 3: Cross multiply
    134,879.65x = 186,019.64 × 81,154.63
  4. Step 4: Simplify right side
    134,879.65x = 15,096,355,056.93
  5. Step 5: Solve for x
    x = 15,096,355,056.93/134,879.65
  6. Step 6: Final answer
    x = 111,924.63

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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.