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Finding the Fourth Proportional to 316,518.20, 474,760.80 and 79,862.94

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Solution

The fourth proportional to 316,518.20, 474,760.80 and 79,862.94 is: 119,790.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,518.20 : 474,760.80 = 79,862.94 : x
  2. Step 2: Convert to fraction form
    316,518.20/474,760.80 = 79,862.94/x
  3. Step 3: Cross multiply
    316,518.20x = 474,760.80 × 79,862.94
  4. Step 4: Simplify right side
    316,518.20x = 37,915,793,284.75
  5. Step 5: Solve for x
    x = 37,915,793,284.75/316,518.20
  6. Step 6: Final answer
    x = 119,790.25

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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.