Home / 205,607.40-308,216.70-121,432.20

Finding the Fourth Proportional to 205,607.40, 308,216.70 and 121,432.20

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Solution

The fourth proportional to 205,607.40, 308,216.70 and 121,432.20 is: 182,033.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,607.40 : 308,216.70 = 121,432.20 : x
  2. Step 2: Convert to fraction form
    205,607.40/308,216.70 = 121,432.20/x
  3. Step 3: Cross multiply
    205,607.40x = 308,216.70 × 121,432.20
  4. Step 4: Simplify right side
    205,607.40x = 37,427,431,957.74
  5. Step 5: Solve for x
    x = 37,427,431,957.74/205,607.40
  6. Step 6: Final answer
    x = 182,033.49

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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.