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Finding the Fourth Proportional to 100,917.44, 139,264.86 and 55,594.52

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Solution

The fourth proportional to 100,917.44, 139,264.86 and 55,594.52 is: 76,719.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,917.44 : 139,264.86 = 55,594.52 : x
  2. Step 2: Convert to fraction form
    100,917.44/139,264.86 = 55,594.52/x
  3. Step 3: Cross multiply
    100,917.44x = 139,264.86 × 55,594.52
  4. Step 4: Simplify right side
    100,917.44x = 7,742,363,044.57
  5. Step 5: Solve for x
    x = 7,742,363,044.57/100,917.44
  6. Step 6: Final answer
    x = 76,719.77

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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.