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Finding the Fourth Proportional to 251,612.96, 347,220.92 and 138,437.60

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Solution

The fourth proportional to 251,612.96, 347,220.92 and 138,437.60 is: 191,041.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,612.96 : 347,220.92 = 138,437.60 : x
  2. Step 2: Convert to fraction form
    251,612.96/347,220.92 = 138,437.60/x
  3. Step 3: Cross multiply
    251,612.96x = 347,220.92 × 138,437.60
  4. Step 4: Simplify right side
    251,612.96x = 48,068,430,834.59
  5. Step 5: Solve for x
    x = 48,068,430,834.59/251,612.96
  6. Step 6: Final answer
    x = 191,041.16

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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.