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Finding the Fourth Proportional to 142,934.70, 197,262 and 79,293

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Solution

The fourth proportional to 142,934.70, 197,262 and 79,293 is: 109,431.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,934.70 : 197,262 = 79,293 : x
  2. Step 2: Convert to fraction form
    142,934.70/197,262 = 79,293/x
  3. Step 3: Cross multiply
    142,934.70x = 197,262 × 79,293
  4. Step 4: Simplify right side
    142,934.70x = 15,641,495,766
  5. Step 5: Solve for x
    x = 15,641,495,766/142,934.70
  6. Step 6: Final answer
    x = 109,431.06

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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.