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Finding the Fourth Proportional to 157,431.60, 236,147.40 and 90,837.45

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Solution

The fourth proportional to 157,431.60, 236,147.40 and 90,837.45 is: 136,256.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,431.60 : 236,147.40 = 90,837.45 : x
  2. Step 2: Convert to fraction form
    157,431.60/236,147.40 = 90,837.45/x
  3. Step 3: Cross multiply
    157,431.60x = 236,147.40 × 90,837.45
  4. Step 4: Simplify right side
    157,431.60x = 21,451,027,640.13
  5. Step 5: Solve for x
    x = 21,451,027,640.13/157,431.60
  6. Step 6: Final answer
    x = 136,256.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.