Home / 105,115.42-145,008.83-68,800.89

Finding the Fourth Proportional to 105,115.42, 145,008.83 and 68,800.89

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Solution

The fourth proportional to 105,115.42, 145,008.83 and 68,800.89 is: 94,912.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,115.42 : 145,008.83 = 68,800.89 : x
  2. Step 2: Convert to fraction form
    105,115.42/145,008.83 = 68,800.89/x
  3. Step 3: Cross multiply
    105,115.42x = 145,008.83 × 68,800.89
  4. Step 4: Simplify right side
    105,115.42x = 9,976,737,277.64
  5. Step 5: Solve for x
    x = 9,976,737,277.64/105,115.42
  6. Step 6: Final answer
    x = 94,912.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.