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Finding the Fourth Proportional to 73,128.83, 109,479.20 and 66,124.76

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Solution

The fourth proportional to 73,128.83, 109,479.20 and 66,124.76 is: 98,993.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,128.83 : 109,479.20 = 66,124.76 : x
  2. Step 2: Convert to fraction form
    73,128.83/109,479.20 = 66,124.76/x
  3. Step 3: Cross multiply
    73,128.83x = 109,479.20 × 66,124.76
  4. Step 4: Simplify right side
    73,128.83x = 7,239,284,946.97
  5. Step 5: Solve for x
    x = 7,239,284,946.97/73,128.83
  6. Step 6: Final answer
    x = 98,993.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.