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Finding the Fourth Proportional to 292,842.12, 439,367.22 and 130,721.48

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Solution

The fourth proportional to 292,842.12, 439,367.22 and 130,721.48 is: 196,128.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,842.12 : 439,367.22 = 130,721.48 : x
  2. Step 2: Convert to fraction form
    292,842.12/439,367.22 = 130,721.48/x
  3. Step 3: Cross multiply
    292,842.12x = 439,367.22 × 130,721.48
  4. Step 4: Simplify right side
    292,842.12x = 57,434,732,712.68
  5. Step 5: Solve for x
    x = 57,434,732,712.68/292,842.12
  6. Step 6: Final answer
    x = 196,128.66

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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.