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Finding the Fourth Proportional to 103,290.66, 154,935.18 and 68,221.98

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Solution

The fourth proportional to 103,290.66, 154,935.18 and 68,221.98 is: 102,332.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,290.66 : 154,935.18 = 68,221.98 : x
  2. Step 2: Convert to fraction form
    103,290.66/154,935.18 = 68,221.98/x
  3. Step 3: Cross multiply
    103,290.66x = 154,935.18 × 68,221.98
  4. Step 4: Simplify right side
    103,290.66x = 10,569,984,751.26
  5. Step 5: Solve for x
    x = 10,569,984,751.26/103,290.66
  6. Step 6: Final answer
    x = 102,332.44

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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.