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Finding the Fourth Proportional to 78,682.20, 108,330.66 and 73,316.76

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Solution

The fourth proportional to 78,682.20, 108,330.66 and 73,316.76 is: 100,943.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,682.20 : 108,330.66 = 73,316.76 : x
  2. Step 2: Convert to fraction form
    78,682.20/108,330.66 = 73,316.76/x
  3. Step 3: Cross multiply
    78,682.20x = 108,330.66 × 73,316.76
  4. Step 4: Simplify right side
    78,682.20x = 7,942,452,999.86
  5. Step 5: Solve for x
    x = 7,942,452,999.86/78,682.20
  6. Step 6: Final answer
    x = 100,943.45

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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.