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Finding the Fourth Proportional to 67,994.40, 102,001.20 and 21,242.40

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Solution

The fourth proportional to 67,994.40, 102,001.20 and 21,242.40 is: 31,866.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,994.40 : 102,001.20 = 21,242.40 : x
  2. Step 2: Convert to fraction form
    67,994.40/102,001.20 = 21,242.40/x
  3. Step 3: Cross multiply
    67,994.40x = 102,001.20 × 21,242.40
  4. Step 4: Simplify right side
    67,994.40x = 2,166,750,290.88
  5. Step 5: Solve for x
    x = 2,166,750,290.88/67,994.40
  6. Step 6: Final answer
    x = 31,866.60

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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.