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Finding the Fourth Proportional to 74,425.80, 111,638.70 and 68,723.40

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Solution

The fourth proportional to 74,425.80, 111,638.70 and 68,723.40 is: 103,085.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,425.80 : 111,638.70 = 68,723.40 : x
  2. Step 2: Convert to fraction form
    74,425.80/111,638.70 = 68,723.40/x
  3. Step 3: Cross multiply
    74,425.80x = 111,638.70 × 68,723.40
  4. Step 4: Simplify right side
    74,425.80x = 7,672,191,035.58
  5. Step 5: Solve for x
    x = 7,672,191,035.58/74,425.80
  6. Step 6: Final answer
    x = 103,085.10

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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.