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Finding the Fourth Proportional to 100,622.86, 138,856.62 and 57,600.93

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Solution

The fourth proportional to 100,622.86, 138,856.62 and 57,600.93 is: 79,487.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,622.86 : 138,856.62 = 57,600.93 : x
  2. Step 2: Convert to fraction form
    100,622.86/138,856.62 = 57,600.93/x
  3. Step 3: Cross multiply
    100,622.86x = 138,856.62 × 57,600.93
  4. Step 4: Simplify right side
    100,622.86x = 7,998,270,096.93
  5. Step 5: Solve for x
    x = 7,998,270,096.93/100,622.86
  6. Step 6: Final answer
    x = 79,487.60

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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.