Home / 145,820.20-218,147.10-126,315.40

Finding the Fourth Proportional to 145,820.20, 218,147.10 and 126,315.40

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Solution

The fourth proportional to 145,820.20, 218,147.10 and 126,315.40 is: 188,967.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,820.20 : 218,147.10 = 126,315.40 : x
  2. Step 2: Convert to fraction form
    145,820.20/218,147.10 = 126,315.40/x
  3. Step 3: Cross multiply
    145,820.20x = 218,147.10 × 126,315.40
  4. Step 4: Simplify right side
    145,820.20x = 27,555,338,195.34
  5. Step 5: Solve for x
    x = 27,555,338,195.34/145,820.20
  6. Step 6: Final answer
    x = 188,967.91

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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.