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Finding the Fourth Proportional to 151,392.48, 208,921.74 and 87,767.16

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Solution

The fourth proportional to 151,392.48, 208,921.74 and 87,767.16 is: 121,118.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,392.48 : 208,921.74 = 87,767.16 : x
  2. Step 2: Convert to fraction form
    151,392.48/208,921.74 = 87,767.16/x
  3. Step 3: Cross multiply
    151,392.48x = 208,921.74 × 87,767.16
  4. Step 4: Simplify right side
    151,392.48x = 18,336,467,782.06
  5. Step 5: Solve for x
    x = 18,336,467,782.06/151,392.48
  6. Step 6: Final answer
    x = 121,118.75

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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.