Home / 272,431.10-408,646.65-85,442.30

Finding the Fourth Proportional to 272,431.10, 408,646.65 and 85,442.30

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Solution

The fourth proportional to 272,431.10, 408,646.65 and 85,442.30 is: 128,163.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,431.10 : 408,646.65 = 85,442.30 : x
  2. Step 2: Convert to fraction form
    272,431.10/408,646.65 = 85,442.30/x
  3. Step 3: Cross multiply
    272,431.10x = 408,646.65 × 85,442.30
  4. Step 4: Simplify right side
    272,431.10x = 34,915,709,663.30
  5. Step 5: Solve for x
    x = 34,915,709,663.30/272,431.10
  6. Step 6: Final answer
    x = 128,163.45

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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.