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Finding the Fourth Proportional to 103,642.87, 155,455.34 and 63,105.91

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Solution

The fourth proportional to 103,642.87, 155,455.34 and 63,105.91 is: 94,653.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,642.87 : 155,455.34 = 63,105.91 : x
  2. Step 2: Convert to fraction form
    103,642.87/155,455.34 = 63,105.91/x
  3. Step 3: Cross multiply
    103,642.87x = 155,455.34 × 63,105.91
  4. Step 4: Simplify right side
    103,642.87x = 9,810,150,695.06
  5. Step 5: Solve for x
    x = 9,810,150,695.06/103,642.87
  6. Step 6: Final answer
    x = 94,653.41

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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.