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Finding the Fourth Proportional to 157,738.72, 217,670.16 and 90,670.72

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Solution

The fourth proportional to 157,738.72, 217,670.16 and 90,670.72 is: 125,120.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,738.72 : 217,670.16 = 90,670.72 : x
  2. Step 2: Convert to fraction form
    157,738.72/217,670.16 = 90,670.72/x
  3. Step 3: Cross multiply
    157,738.72x = 217,670.16 × 90,670.72
  4. Step 4: Simplify right side
    157,738.72x = 19,736,310,129.72
  5. Step 5: Solve for x
    x = 19,736,310,129.72/157,738.72
  6. Step 6: Final answer
    x = 125,120.26

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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.