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Finding the Fourth Proportional to 157,644.60, 236,466.90 and 143,129.40

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Solution

The fourth proportional to 157,644.60, 236,466.90 and 143,129.40 is: 214,694.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,644.60 : 236,466.90 = 143,129.40 : x
  2. Step 2: Convert to fraction form
    157,644.60/236,466.90 = 143,129.40/x
  3. Step 3: Cross multiply
    157,644.60x = 236,466.90 × 143,129.40
  4. Step 4: Simplify right side
    157,644.60x = 33,845,365,516.86
  5. Step 5: Solve for x
    x = 33,845,365,516.86/157,644.60
  6. Step 6: Final answer
    x = 214,694.10

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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.