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Finding the Fourth Proportional to 157,348.54, 217,143.48 and 85,728.54

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Solution

The fourth proportional to 157,348.54, 217,143.48 and 85,728.54 is: 118,306.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,348.54 : 217,143.48 = 85,728.54 : x
  2. Step 2: Convert to fraction form
    157,348.54/217,143.48 = 85,728.54/x
  3. Step 3: Cross multiply
    157,348.54x = 217,143.48 × 85,728.54
  4. Step 4: Simplify right side
    157,348.54x = 18,615,393,510.92
  5. Step 5: Solve for x
    x = 18,615,393,510.92/157,348.54
  6. Step 6: Final answer
    x = 118,306.74

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1.5x scale

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.