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Finding the Fourth Proportional to 292,280.77, 438,371.75 and 81,870.31

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Solution

The fourth proportional to 292,280.77, 438,371.75 and 81,870.31 is: 122,791.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,280.77 : 438,371.75 = 81,870.31 : x
  2. Step 2: Convert to fraction form
    292,280.77/438,371.75 = 81,870.31/x
  3. Step 3: Cross multiply
    292,280.77x = 438,371.75 × 81,870.31
  4. Step 4: Simplify right side
    292,280.77x = 35,889,631,359.86
  5. Step 5: Solve for x
    x = 35,889,631,359.86/292,280.77
  6. Step 6: Final answer
    x = 122,791.63

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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.