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Finding the Fourth Proportional to 68,875.40, 103,313.10 and 68,219.30

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Solution

The fourth proportional to 68,875.40, 103,313.10 and 68,219.30 is: 102,328.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,875.40 : 103,313.10 = 68,219.30 : x
  2. Step 2: Convert to fraction form
    68,875.40/103,313.10 = 68,219.30/x
  3. Step 3: Cross multiply
    68,875.40x = 103,313.10 × 68,219.30
  4. Step 4: Simplify right side
    68,875.40x = 7,047,947,362.83
  5. Step 5: Solve for x
    x = 7,047,947,362.83/68,875.40
  6. Step 6: Final answer
    x = 102,328.95

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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.