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Finding the Fourth Proportional to 345,399.12, 518,101.11 and 120,758.58

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Solution

The fourth proportional to 345,399.12, 518,101.11 and 120,758.58 is: 181,138.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,399.12 : 518,101.11 = 120,758.58 : x
  2. Step 2: Convert to fraction form
    345,399.12/518,101.11 = 120,758.58/x
  3. Step 3: Cross multiply
    345,399.12x = 518,101.11 × 120,758.58
  4. Step 4: Simplify right side
    345,399.12x = 62,565,154,340.02
  5. Step 5: Solve for x
    x = 62,565,154,340.02/345,399.12
  6. Step 6: Final answer
    x = 181,138.72

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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.