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Finding the Fourth Proportional to 151,356.16, 208,871.48 and 87,730.86

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Solution

The fourth proportional to 151,356.16, 208,871.48 and 87,730.86 is: 121,068.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,356.16 : 208,871.48 = 87,730.86 : x
  2. Step 2: Convert to fraction form
    151,356.16/208,871.48 = 87,730.86/x
  3. Step 3: Cross multiply
    151,356.16x = 208,871.48 × 87,730.86
  4. Step 4: Simplify right side
    151,356.16x = 18,324,474,789.20
  5. Step 5: Solve for x
    x = 18,324,474,789.20/151,356.16
  6. Step 6: Final answer
    x = 121,068.58

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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.