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Finding the Fourth Proportional to 70,386.80, 105,637.80 and 68,082.80

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Solution

The fourth proportional to 70,386.80, 105,637.80 and 68,082.80 is: 102,179.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,386.80 : 105,637.80 = 68,082.80 : x
  2. Step 2: Convert to fraction form
    70,386.80/105,637.80 = 68,082.80/x
  3. Step 3: Cross multiply
    70,386.80x = 105,637.80 × 68,082.80
  4. Step 4: Simplify right side
    70,386.80x = 7,192,117,209.84
  5. Step 5: Solve for x
    x = 7,192,117,209.84/70,386.80
  6. Step 6: Final answer
    x = 102,179.91

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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.