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Finding the Fourth Proportional to 103,315.40, 154,713.90 and 68,064.20

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Solution

The fourth proportional to 103,315.40, 154,713.90 and 68,064.20 is: 101,925.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,315.40 : 154,713.90 = 68,064.20 : x
  2. Step 2: Convert to fraction form
    103,315.40/154,713.90 = 68,064.20/x
  3. Step 3: Cross multiply
    103,315.40x = 154,713.90 × 68,064.20
  4. Step 4: Simplify right side
    103,315.40x = 10,530,477,832.38
  5. Step 5: Solve for x
    x = 10,530,477,832.38/103,315.40
  6. Step 6: Final answer
    x = 101,925.54

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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.