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Finding the Fourth Proportional to 151,364.81, 208,883.50 and 87,739.52

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Solution

The fourth proportional to 151,364.81, 208,883.50 and 87,739.52 is: 121,080.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,364.81 : 208,883.50 = 87,739.52 : x
  2. Step 2: Convert to fraction form
    151,364.81/208,883.50 = 87,739.52/x
  3. Step 3: Cross multiply
    151,364.81x = 208,883.50 × 87,739.52
  4. Step 4: Simplify right side
    151,364.81x = 18,327,336,762.15
  5. Step 5: Solve for x
    x = 18,327,336,762.15/151,364.81
  6. Step 6: Final answer
    x = 121,080.56

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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.