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Finding the Fourth Proportional to 68,102.76, 102,154.14 and 20,718.30

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Solution

The fourth proportional to 68,102.76, 102,154.14 and 20,718.30 is: 31,077.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,102.76 : 102,154.14 = 20,718.30 : x
  2. Step 2: Convert to fraction form
    68,102.76/102,154.14 = 20,718.30/x
  3. Step 3: Cross multiply
    68,102.76x = 102,154.14 × 20,718.30
  4. Step 4: Simplify right side
    68,102.76x = 2,116,460,118.76
  5. Step 5: Solve for x
    x = 2,116,460,118.76/68,102.76
  6. Step 6: Final answer
    x = 31,077.45

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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.