Home / 140,001.20-210,001.80-90,137.60

Finding the Fourth Proportional to 140,001.20, 210,001.80 and 90,137.60

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Solution

The fourth proportional to 140,001.20, 210,001.80 and 90,137.60 is: 135,206.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,001.20 : 210,001.80 = 90,137.60 : x
  2. Step 2: Convert to fraction form
    140,001.20/210,001.80 = 90,137.60/x
  3. Step 3: Cross multiply
    140,001.20x = 210,001.80 × 90,137.60
  4. Step 4: Simplify right side
    140,001.20x = 18,929,058,247.68
  5. Step 5: Solve for x
    x = 18,929,058,247.68/140,001.20
  6. Step 6: Final answer
    x = 135,206.40

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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.