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Finding the Fourth Proportional to 100,753.58, 139,059.81 and 57,761.93

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Solution

The fourth proportional to 100,753.58, 139,059.81 and 57,761.93 is: 79,722.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,753.58 : 139,059.81 = 57,761.93 : x
  2. Step 2: Convert to fraction form
    100,753.58/139,059.81 = 57,761.93/x
  3. Step 3: Cross multiply
    100,753.58x = 139,059.81 × 57,761.93
  4. Step 4: Simplify right side
    100,753.58x = 8,032,363,358.68
  5. Step 5: Solve for x
    x = 8,032,363,358.68/100,753.58
  6. Step 6: Final answer
    x = 79,722.86

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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.