Home / 68,061.60-102,099.12-21,315.36

Finding the Fourth Proportional to 68,061.60, 102,099.12 and 21,315.36

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Solution

The fourth proportional to 68,061.60, 102,099.12 and 21,315.36 is: 31,975.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,061.60 : 102,099.12 = 21,315.36 : x
  2. Step 2: Convert to fraction form
    68,061.60/102,099.12 = 21,315.36/x
  3. Step 3: Cross multiply
    68,061.60x = 102,099.12 × 21,315.36
  4. Step 4: Simplify right side
    68,061.60x = 2,176,279,498.48
  5. Step 5: Solve for x
    x = 2,176,279,498.48/68,061.60
  6. Step 6: Final answer
    x = 31,975.14

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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.