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Finding the Fourth Proportional to 145,371.72, 218,054.84 and 79,232.74

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Solution

The fourth proportional to 145,371.72, 218,054.84 and 79,232.74 is: 118,847.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,371.72 : 218,054.84 = 79,232.74 : x
  2. Step 2: Convert to fraction form
    145,371.72/218,054.84 = 79,232.74/x
  3. Step 3: Cross multiply
    145,371.72x = 218,054.84 × 79,232.74
  4. Step 4: Simplify right side
    145,371.72x = 17,277,081,502.16
  5. Step 5: Solve for x
    x = 17,277,081,502.16/145,371.72
  6. Step 6: Final answer
    x = 118,847.61

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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.