Home / 210,876.20-315,930.30-99,823.40

Finding the Fourth Proportional to 210,876.20, 315,930.30 and 99,823.40

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Solution

The fourth proportional to 210,876.20, 315,930.30 and 99,823.40 is: 149,553.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,876.20 : 315,930.30 = 99,823.40 : x
  2. Step 2: Convert to fraction form
    210,876.20/315,930.30 = 99,823.40/x
  3. Step 3: Cross multiply
    210,876.20x = 315,930.30 × 99,823.40
  4. Step 4: Simplify right side
    210,876.20x = 31,537,236,709.02
  5. Step 5: Solve for x
    x = 31,537,236,709.02/210,876.20
  6. Step 6: Final answer
    x = 149,553.32

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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.