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Finding the Fourth Proportional to 292,239.45, 438,363.51 and 81,864.09

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Solution

The fourth proportional to 292,239.45, 438,363.51 and 81,864.09 is: 122,797.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,239.45 : 438,363.51 = 81,864.09 : x
  2. Step 2: Convert to fraction form
    292,239.45/438,363.51 = 81,864.09/x
  3. Step 3: Cross multiply
    292,239.45x = 438,363.51 × 81,864.09
  4. Step 4: Simplify right side
    292,239.45x = 35,886,229,835.36
  5. Step 5: Solve for x
    x = 35,886,229,835.36/292,239.45
  6. Step 6: Final answer
    x = 122,797.35

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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.