Home / 199,139.10-298,708.65-128,280.30

Finding the Fourth Proportional to 199,139.10, 298,708.65 and 128,280.30

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Solution

The fourth proportional to 199,139.10, 298,708.65 and 128,280.30 is: 192,420.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,139.10 : 298,708.65 = 128,280.30 : x
  2. Step 2: Convert to fraction form
    199,139.10/298,708.65 = 128,280.30/x
  3. Step 3: Cross multiply
    199,139.10x = 298,708.65 × 128,280.30
  4. Step 4: Simplify right side
    199,139.10x = 38,318,435,234.60
  5. Step 5: Solve for x
    x = 38,318,435,234.60/199,139.10
  6. Step 6: Final answer
    x = 192,420.45

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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.