Home / 68,660.16-102,985.12-21,275.62

Finding the Fourth Proportional to 68,660.16, 102,985.12 and 21,275.62

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Solution

The fourth proportional to 68,660.16, 102,985.12 and 21,275.62 is: 31,911.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,660.16 : 102,985.12 = 21,275.62 : x
  2. Step 2: Convert to fraction form
    68,660.16/102,985.12 = 21,275.62/x
  3. Step 3: Cross multiply
    68,660.16x = 102,985.12 × 21,275.62
  4. Step 4: Simplify right side
    68,660.16x = 2,191,072,278.77
  5. Step 5: Solve for x
    x = 2,191,072,278.77/68,660.16
  6. Step 6: Final answer
    x = 31,911.84

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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.