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Finding the Fourth Proportional to 68,607.32, 102,909.72 and 18,686.66

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Solution

The fourth proportional to 68,607.32, 102,909.72 and 18,686.66 is: 28,029.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,607.32 : 102,909.72 = 18,686.66 : x
  2. Step 2: Convert to fraction form
    68,607.32/102,909.72 = 18,686.66/x
  3. Step 3: Cross multiply
    68,607.32x = 102,909.72 × 18,686.66
  4. Step 4: Simplify right side
    68,607.32x = 1,923,038,948.34
  5. Step 5: Solve for x
    x = 1,923,038,948.34/68,607.32
  6. Step 6: Final answer
    x = 28,029.65

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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.