Home / 68,905.78-103,359.14-18,988.58

Finding the Fourth Proportional to 68,905.78, 103,359.14 and 18,988.58

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Solution

The fourth proportional to 68,905.78, 103,359.14 and 18,988.58 is: 28,483.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,905.78 : 103,359.14 = 18,988.58 : x
  2. Step 2: Convert to fraction form
    68,905.78/103,359.14 = 18,988.58/x
  3. Step 3: Cross multiply
    68,905.78x = 103,359.14 × 18,988.58
  4. Step 4: Simplify right side
    68,905.78x = 1,962,643,298.62
  5. Step 5: Solve for x
    x = 1,962,643,298.62/68,905.78
  6. Step 6: Final answer
    x = 28,483.00

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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.