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Finding the Fourth Proportional to 292,491.59, 438,764.16 and 82,128.11

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Solution

The fourth proportional to 292,491.59, 438,764.16 and 82,128.11 is: 123,199.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,491.59 : 438,764.16 = 82,128.11 : x
  2. Step 2: Convert to fraction form
    292,491.59/438,764.16 = 82,128.11/x
  3. Step 3: Cross multiply
    292,491.59x = 438,764.16 × 82,128.11
  4. Step 4: Simplify right side
    292,491.59x = 36,034,871,196.54
  5. Step 5: Solve for x
    x = 36,034,871,196.54/292,491.59
  6. Step 6: Final answer
    x = 123,199.68

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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.