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Finding the Fourth Proportional to 157,428.90, 236,143.35 and 126,324.90

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Solution

The fourth proportional to 157,428.90, 236,143.35 and 126,324.90 is: 189,487.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,428.90 : 236,143.35 = 126,324.90 : x
  2. Step 2: Convert to fraction form
    157,428.90/236,143.35 = 126,324.90/x
  3. Step 3: Cross multiply
    157,428.90x = 236,143.35 × 126,324.90
  4. Step 4: Simplify right side
    157,428.90x = 29,830,785,074.42
  5. Step 5: Solve for x
    x = 29,830,785,074.42/157,428.90
  6. Step 6: Final answer
    x = 189,487.35

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1.5x scale

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.