Home / 205,424.10-308,136.15-137,772.90

Finding the Fourth Proportional to 205,424.10, 308,136.15 and 137,772.90

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Solution

The fourth proportional to 205,424.10, 308,136.15 and 137,772.90 is: 206,659.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,424.10 : 308,136.15 = 137,772.90 : x
  2. Step 2: Convert to fraction form
    205,424.10/308,136.15 = 137,772.90/x
  3. Step 3: Cross multiply
    205,424.10x = 308,136.15 × 137,772.90
  4. Step 4: Simplify right side
    205,424.10x = 42,452,810,980.34
  5. Step 5: Solve for x
    x = 42,452,810,980.34/205,424.10
  6. Step 6: Final answer
    x = 206,659.35

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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.