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Finding the Fourth Proportional to 68,717.72, 103,098.10 and 20,688.23

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Solution

The fourth proportional to 68,717.72, 103,098.10 and 20,688.23 is: 31,038.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,717.72 : 103,098.10 = 20,688.23 : x
  2. Step 2: Convert to fraction form
    68,717.72/103,098.10 = 20,688.23/x
  3. Step 3: Cross multiply
    68,717.72x = 103,098.10 × 20,688.23
  4. Step 4: Simplify right side
    68,717.72x = 2,132,916,870.25
  5. Step 5: Solve for x
    x = 2,132,916,870.25/68,717.72
  6. Step 6: Final answer
    x = 31,038.82

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1.5x scale

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.