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Finding the Fourth Proportional to 68,124.40, 102,186.60 and 21,377.20

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Solution

The fourth proportional to 68,124.40, 102,186.60 and 21,377.20 is: 32,065.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,124.40 : 102,186.60 = 21,377.20 : x
  2. Step 2: Convert to fraction form
    68,124.40/102,186.60 = 21,377.20/x
  3. Step 3: Cross multiply
    68,124.40x = 102,186.60 × 21,377.20
  4. Step 4: Simplify right side
    68,124.40x = 2,184,463,385.52
  5. Step 5: Solve for x
    x = 2,184,463,385.52/68,124.40
  6. Step 6: Final answer
    x = 32,065.80

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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.