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Finding the Fourth Proportional to 251,904.33, 347,615.15 and 138,705.21

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Solution

The fourth proportional to 251,904.33, 347,615.15 and 138,705.21 is: 191,406.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,904.33 : 347,615.15 = 138,705.21 : x
  2. Step 2: Convert to fraction form
    251,904.33/347,615.15 = 138,705.21/x
  3. Step 3: Cross multiply
    251,904.33x = 347,615.15 × 138,705.21
  4. Step 4: Simplify right side
    251,904.33x = 48,216,031,686.41
  5. Step 5: Solve for x
    x = 48,216,031,686.41/251,904.33
  6. Step 6: Final answer
    x = 191,406.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.