Home / 209,956.10-315,007.05-91,712.30

Finding the Fourth Proportional to 209,956.10, 315,007.05 and 91,712.30

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Solution

The fourth proportional to 209,956.10, 315,007.05 and 91,712.30 is: 137,600.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,956.10 : 315,007.05 = 91,712.30 : x
  2. Step 2: Convert to fraction form
    209,956.10/315,007.05 = 91,712.30/x
  3. Step 3: Cross multiply
    209,956.10x = 315,007.05 × 91,712.30
  4. Step 4: Simplify right side
    209,956.10x = 28,890,021,071.72
  5. Step 5: Solve for x
    x = 28,890,021,071.72/209,956.10
  6. Step 6: Final answer
    x = 137,600.29

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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.