Home / 209,988.30-315,130.07-189,911.64

Finding the Fourth Proportional to 209,988.30, 315,130.07 and 189,911.64

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Solution

The fourth proportional to 209,988.30, 315,130.07 and 189,911.64 is: 285,000.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,988.30 : 315,130.07 = 189,911.64 : x
  2. Step 2: Convert to fraction form
    209,988.30/315,130.07 = 189,911.64/x
  3. Step 3: Cross multiply
    209,988.30x = 315,130.07 × 189,911.64
  4. Step 4: Simplify right side
    209,988.30x = 59,846,868,407.01
  5. Step 5: Solve for x
    x = 59,846,868,407.01/209,988.30
  6. Step 6: Final answer
    x = 285,000.97

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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.