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Finding the Fourth Proportional to 157,348.07, 217,140.33 and 85,728.07

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Solution

The fourth proportional to 157,348.07, 217,140.33 and 85,728.07 is: 118,304.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,348.07 : 217,140.33 = 85,728.07 : x
  2. Step 2: Convert to fraction form
    157,348.07/217,140.33 = 85,728.07/x
  3. Step 3: Cross multiply
    157,348.07x = 217,140.33 × 85,728.07
  4. Step 4: Simplify right side
    157,348.07x = 18,615,019,895.72
  5. Step 5: Solve for x
    x = 18,615,019,895.72/157,348.07
  6. Step 6: Final answer
    x = 118,304.73

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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.