Home / 343,387.20-515,080.80-90,667.20

Finding the Fourth Proportional to 343,387.20, 515,080.80 and 90,667.20

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Solution

The fourth proportional to 343,387.20, 515,080.80 and 90,667.20 is: 136,000.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,387.20 : 515,080.80 = 90,667.20 : x
  2. Step 2: Convert to fraction form
    343,387.20/515,080.80 = 90,667.20/x
  3. Step 3: Cross multiply
    343,387.20x = 515,080.80 × 90,667.20
  4. Step 4: Simplify right side
    343,387.20x = 46,700,933,909.76
  5. Step 5: Solve for x
    x = 46,700,933,909.76/343,387.20
  6. Step 6: Final answer
    x = 136,000.80

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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.