Home / 342,371.10-513,456.30-128,985.05

Finding the Fourth Proportional to 342,371.10, 513,456.30 and 128,985.05

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Solution

The fourth proportional to 342,371.10, 513,456.30 and 128,985.05 is: 193,439.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,371.10 : 513,456.30 = 128,985.05 : x
  2. Step 2: Convert to fraction form
    342,371.10/513,456.30 = 128,985.05/x
  3. Step 3: Cross multiply
    342,371.10x = 513,456.30 × 128,985.05
  4. Step 4: Simplify right side
    342,371.10x = 66,228,183,316.11
  5. Step 5: Solve for x
    x = 66,228,183,316.11/342,371.10
  6. Step 6: Final answer
    x = 193,439.76

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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.