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Finding the Fourth Proportional to 292,036.38, 438,081.30 and 81,673.74

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Solution

The fourth proportional to 292,036.38, 438,081.30 and 81,673.74 is: 122,518.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,036.38 : 438,081.30 = 81,673.74 : x
  2. Step 2: Convert to fraction form
    292,036.38/438,081.30 = 81,673.74/x
  3. Step 3: Cross multiply
    292,036.38x = 438,081.30 × 81,673.74
  4. Step 4: Simplify right side
    292,036.38x = 35,779,738,195.06
  5. Step 5: Solve for x
    x = 35,779,738,195.06/292,036.38
  6. Step 6: Final answer
    x = 122,518.09

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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.