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Finding the Fourth Proportional to 100,851.90, 139,174.47 and 55,528.95

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Solution

The fourth proportional to 100,851.90, 139,174.47 and 55,528.95 is: 76,629.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,851.90 : 139,174.47 = 55,528.95 : x
  2. Step 2: Convert to fraction form
    100,851.90/139,174.47 = 55,528.95/x
  3. Step 3: Cross multiply
    100,851.90x = 139,174.47 × 55,528.95
  4. Step 4: Simplify right side
    100,851.90x = 7,728,212,185.91
  5. Step 5: Solve for x
    x = 7,728,212,185.91/100,851.90
  6. Step 6: Final answer
    x = 76,629.32

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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.