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Finding the Fourth Proportional to 292,291.38, 438,387.63 and 81,880.92

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Solution

The fourth proportional to 292,291.38, 438,387.63 and 81,880.92 is: 122,807.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,291.38 : 438,387.63 = 81,880.92 : x
  2. Step 2: Convert to fraction form
    292,291.38/438,387.63 = 81,880.92/x
  3. Step 3: Cross multiply
    292,291.38x = 438,387.63 × 81,880.92
  4. Step 4: Simplify right side
    292,291.38x = 35,895,582,461.02
  5. Step 5: Solve for x
    x = 35,895,582,461.02/292,291.38
  6. Step 6: Final answer
    x = 122,807.53

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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.