Home / 100,943.72-139,308.64-55,621.68

Finding the Fourth Proportional to 100,943.72, 139,308.64 and 55,621.68

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Solution

The fourth proportional to 100,943.72, 139,308.64 and 55,621.68 is: 76,761.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,943.72 : 139,308.64 = 55,621.68 : x
  2. Step 2: Convert to fraction form
    100,943.72/139,308.64 = 55,621.68/x
  3. Step 3: Cross multiply
    100,943.72x = 139,308.64 × 55,621.68
  4. Step 4: Simplify right side
    100,943.72x = 7,748,580,595.32
  5. Step 5: Solve for x
    x = 7,748,580,595.32/100,943.72
  6. Step 6: Final answer
    x = 76,761.39

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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.