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Finding the Fourth Proportional to 157,485.89, 217,326.60 and 85,867.31

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Solution

The fourth proportional to 157,485.89, 217,326.60 and 85,867.31 is: 118,494.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,485.89 : 217,326.60 = 85,867.31 : x
  2. Step 2: Convert to fraction form
    157,485.89/217,326.60 = 85,867.31/x
  3. Step 3: Cross multiply
    157,485.89x = 217,326.60 × 85,867.31
  4. Step 4: Simplify right side
    157,485.89x = 18,661,251,076.76
  5. Step 5: Solve for x
    x = 18,661,251,076.76/157,485.89
  6. Step 6: Final answer
    x = 118,494.75

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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.