Home / 100,930.36-139,287.66-56,221.24

Finding the Fourth Proportional to 100,930.36, 139,287.66 and 56,221.24

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Solution

The fourth proportional to 100,930.36, 139,287.66 and 56,221.24 is: 77,587.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,930.36 : 139,287.66 = 56,221.24 : x
  2. Step 2: Convert to fraction form
    100,930.36/139,287.66 = 56,221.24/x
  3. Step 3: Cross multiply
    100,930.36x = 139,287.66 × 56,221.24
  4. Step 4: Simplify right side
    100,930.36x = 7,830,924,961.90
  5. Step 5: Solve for x
    x = 7,830,924,961.90/100,930.36
  6. Step 6: Final answer
    x = 77,587.41

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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.