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Finding the Fourth Proportional to 103,603.91, 155,405.88 and 68,535.36

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Solution

The fourth proportional to 103,603.91, 155,405.88 and 68,535.36 is: 102,803.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,603.91 : 155,405.88 = 68,535.36 : x
  2. Step 2: Convert to fraction form
    103,603.91/155,405.88 = 68,535.36/x
  3. Step 3: Cross multiply
    103,603.91x = 155,405.88 × 68,535.36
  4. Step 4: Simplify right side
    103,603.91x = 10,650,797,931.92
  5. Step 5: Solve for x
    x = 10,650,797,931.92/103,603.91
  6. Step 6: Final answer
    x = 102,803.05

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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.