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Finding the Fourth Proportional to 157,998.72, 218,093.12 and 90,957.44

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Solution

The fourth proportional to 157,998.72, 218,093.12 and 90,957.44 is: 125,552.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,998.72 : 218,093.12 = 90,957.44 : x
  2. Step 2: Convert to fraction form
    157,998.72/218,093.12 = 90,957.44/x
  3. Step 3: Cross multiply
    157,998.72x = 218,093.12 × 90,957.44
  4. Step 4: Simplify right side
    157,998.72x = 19,837,191,876.81
  5. Step 5: Solve for x
    x = 19,837,191,876.81/157,998.72
  6. Step 6: Final answer
    x = 125,552.86

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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.