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Finding the Fourth Proportional to 68,159.84, 102,255.20 and 20,779.12

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Solution

The fourth proportional to 68,159.84, 102,255.20 and 20,779.12 is: 31,173.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,159.84 : 102,255.20 = 20,779.12 : x
  2. Step 2: Convert to fraction form
    68,159.84/102,255.20 = 20,779.12/x
  3. Step 3: Cross multiply
    68,159.84x = 102,255.20 × 20,779.12
  4. Step 4: Simplify right side
    68,159.84x = 2,124,773,071.42
  5. Step 5: Solve for x
    x = 2,124,773,071.42/68,159.84
  6. Step 6: Final answer
    x = 31,173.39

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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.