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Finding the Fourth Proportional to 140,291.10, 210,205.80 and 81,023.40

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Solution

The fourth proportional to 140,291.10, 210,205.80 and 81,023.40 is: 121,401.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,291.10 : 210,205.80 = 81,023.40 : x
  2. Step 2: Convert to fraction form
    140,291.10/210,205.80 = 81,023.40/x
  3. Step 3: Cross multiply
    140,291.10x = 210,205.80 × 81,023.40
  4. Step 4: Simplify right side
    140,291.10x = 17,031,588,615.72
  5. Step 5: Solve for x
    x = 17,031,588,615.72/140,291.10
  6. Step 6: Final answer
    x = 121,401.78

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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.