Home / 103,511.10-155,266.65-72,018.30

Finding the Fourth Proportional to 103,511.10, 155,266.65 and 72,018.30

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Solution

The fourth proportional to 103,511.10, 155,266.65 and 72,018.30 is: 108,027.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,511.10 : 155,266.65 = 72,018.30 : x
  2. Step 2: Convert to fraction form
    103,511.10/155,266.65 = 72,018.30/x
  3. Step 3: Cross multiply
    103,511.10x = 155,266.65 × 72,018.30
  4. Step 4: Simplify right side
    103,511.10x = 11,182,040,179.70
  5. Step 5: Solve for x
    x = 11,182,040,179.70/103,511.10
  6. Step 6: Final answer
    x = 108,027.45

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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.