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Finding the Fourth Proportional to 292,122.72, 438,125.76 and 92,409.12

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Solution

The fourth proportional to 292,122.72, 438,125.76 and 92,409.12 is: 138,595.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,122.72 : 438,125.76 = 92,409.12 : x
  2. Step 2: Convert to fraction form
    292,122.72/438,125.76 = 92,409.12/x
  3. Step 3: Cross multiply
    292,122.72x = 438,125.76 × 92,409.12
  4. Step 4: Simplify right side
    292,122.72x = 40,486,815,930.93
  5. Step 5: Solve for x
    x = 40,486,815,930.93/292,122.72
  6. Step 6: Final answer
    x = 138,595.23

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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.