Home / 191,489.38-287,365.28-66,830.38

Finding the Fourth Proportional to 191,489.38, 287,365.28 and 66,830.38

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Solution

The fourth proportional to 191,489.38, 287,365.28 and 66,830.38 is: 100,291.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,489.38 : 287,365.28 = 66,830.38 : x
  2. Step 2: Convert to fraction form
    191,489.38/287,365.28 = 66,830.38/x
  3. Step 3: Cross multiply
    191,489.38x = 287,365.28 × 66,830.38
  4. Step 4: Simplify right side
    191,489.38x = 19,204,730,861.21
  5. Step 5: Solve for x
    x = 19,204,730,861.21/191,489.38
  6. Step 6: Final answer
    x = 100,291.36

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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.