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Finding the Fourth Proportional to 137,607.40, 206,216.70 and 84,860.20

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Solution

The fourth proportional to 137,607.40, 206,216.70 and 84,860.20 is: 127,170.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,607.40 : 206,216.70 = 84,860.20 : x
  2. Step 2: Convert to fraction form
    137,607.40/206,216.70 = 84,860.20/x
  3. Step 3: Cross multiply
    137,607.40x = 206,216.70 × 84,860.20
  4. Step 4: Simplify right side
    137,607.40x = 17,499,590,405.34
  5. Step 5: Solve for x
    x = 17,499,590,405.34/137,607.40
  6. Step 6: Final answer
    x = 127,170.42

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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.