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Finding the Fourth Proportional to 213,017.10, 319,404.15 and 79,901.70

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Solution

The fourth proportional to 213,017.10, 319,404.15 and 79,901.70 is: 119,806.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,017.10 : 319,404.15 = 79,901.70 : x
  2. Step 2: Convert to fraction form
    213,017.10/319,404.15 = 79,901.70/x
  3. Step 3: Cross multiply
    213,017.10x = 319,404.15 × 79,901.70
  4. Step 4: Simplify right side
    213,017.10x = 25,520,934,572.06
  5. Step 5: Solve for x
    x = 25,520,934,572.06/213,017.10
  6. Step 6: Final answer
    x = 119,806.98

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1.5x scale

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.