Home / 205,973.64-309,478.10-131,127.21

Finding the Fourth Proportional to 205,973.64, 309,478.10 and 131,127.21

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Solution

The fourth proportional to 205,973.64, 309,478.10 and 131,127.21 is: 197,020.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,973.64 : 309,478.10 = 131,127.21 : x
  2. Step 2: Convert to fraction form
    205,973.64/309,478.10 = 131,127.21/x
  3. Step 3: Cross multiply
    205,973.64x = 309,478.10 × 131,127.21
  4. Step 4: Simplify right side
    205,973.64x = 40,580,999,153.46
  5. Step 5: Solve for x
    x = 40,580,999,153.46/205,973.64
  6. Step 6: Final answer
    x = 197,020.35

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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.