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Finding the Fourth Proportional to 136,668.66, 188,602.94 and 79,319.18

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Solution

The fourth proportional to 136,668.66, 188,602.94 and 79,319.18 is: 109,460.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,668.66 : 188,602.94 = 79,319.18 : x
  2. Step 2: Convert to fraction form
    136,668.66/188,602.94 = 79,319.18/x
  3. Step 3: Cross multiply
    136,668.66x = 188,602.94 × 79,319.18
  4. Step 4: Simplify right side
    136,668.66x = 14,959,829,801.67
  5. Step 5: Solve for x
    x = 14,959,829,801.67/136,668.66
  6. Step 6: Final answer
    x = 109,460.57

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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.