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Finding the Fourth Proportional to 159,278, 219,808.82 and 91,307.86

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Solution

The fourth proportional to 159,278, 219,808.82 and 91,307.86 is: 126,007.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,278 : 219,808.82 = 91,307.86 : x
  2. Step 2: Convert to fraction form
    159,278/219,808.82 = 91,307.86/x
  3. Step 3: Cross multiply
    159,278x = 219,808.82 × 91,307.86
  4. Step 4: Simplify right side
    159,278x = 20,070,271,407.74
  5. Step 5: Solve for x
    x = 20,070,271,407.74/159,278
  6. Step 6: Final answer
    x = 126,007.81

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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.