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Finding the Fourth Proportional to 157,428.40, 236,142.60 and 126,324.40

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Solution

The fourth proportional to 157,428.40, 236,142.60 and 126,324.40 is: 189,486.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,428.40 : 236,142.60 = 126,324.40 : x
  2. Step 2: Convert to fraction form
    157,428.40/236,142.60 = 126,324.40/x
  3. Step 3: Cross multiply
    157,428.40x = 236,142.60 × 126,324.40
  4. Step 4: Simplify right side
    157,428.40x = 29,830,572,259.44
  5. Step 5: Solve for x
    x = 29,830,572,259.44/157,428.40
  6. Step 6: Final answer
    x = 189,486.60

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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.