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Finding the Fourth Proportional to 157,697.88, 217,621.26 and 86,077.32

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Solution

The fourth proportional to 157,697.88, 217,621.26 and 86,077.32 is: 118,785.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,697.88 : 217,621.26 = 86,077.32 : x
  2. Step 2: Convert to fraction form
    157,697.88/217,621.26 = 86,077.32/x
  3. Step 3: Cross multiply
    157,697.88x = 217,621.26 × 86,077.32
  4. Step 4: Simplify right side
    157,697.88x = 18,732,254,835.82
  5. Step 5: Solve for x
    x = 18,732,254,835.82/157,697.88
  6. Step 6: Final answer
    x = 118,785.71

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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.