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Finding the Fourth Proportional to 68,001.40, 102,002.10 and 21,254.20

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Solution

The fourth proportional to 68,001.40, 102,002.10 and 21,254.20 is: 31,881.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,001.40 : 102,002.10 = 21,254.20 : x
  2. Step 2: Convert to fraction form
    68,001.40/102,002.10 = 21,254.20/x
  3. Step 3: Cross multiply
    68,001.40x = 102,002.10 × 21,254.20
  4. Step 4: Simplify right side
    68,001.40x = 2,167,973,033.82
  5. Step 5: Solve for x
    x = 2,167,973,033.82/68,001.40
  6. Step 6: Final answer
    x = 31,881.30

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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.