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Finding the Fourth Proportional to 68,808.40, 103,212.60 and 42,542.80

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Solution

The fourth proportional to 68,808.40, 103,212.60 and 42,542.80 is: 63,814.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,808.40 : 103,212.60 = 42,542.80 : x
  2. Step 2: Convert to fraction form
    68,808.40/103,212.60 = 42,542.80/x
  3. Step 3: Cross multiply
    68,808.40x = 103,212.60 × 42,542.80
  4. Step 4: Simplify right side
    68,808.40x = 4,390,952,999.28
  5. Step 5: Solve for x
    x = 4,390,952,999.28/68,808.40
  6. Step 6: Final answer
    x = 63,814.20

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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.