Home / 206,899,309.90-310,324,081.65-85,718,125.90

Finding the Fourth Proportional to 206,899,309.90, 310,324,081.65 and 85,718,125.90

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Solution

The fourth proportional to 206,899,309.90, 310,324,081.65 and 85,718,125.90 is: 128,566,879.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,899,309.90 : 310,324,081.65 = 85,718,125.90 : x
  2. Step 2: Convert to fraction form
    206,899,309.90/310,324,081.65 = 85,718,125.90/x
  3. Step 3: Cross multiply
    206,899,309.90x = 310,324,081.65 × 85,718,125.90
  4. Step 4: Simplify right side
    206,899,309.90x = 26,600,398,700,676,580
  5. Step 5: Solve for x
    x = 26,600,398,700,676,580/206,899,309.90
  6. Step 6: Final answer
    x = 128,566,879.77

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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.