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Finding the Fourth Proportional to 137,658.90, 190,004.21 and 94,069.10

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Solution

The fourth proportional to 137,658.90, 190,004.21 and 94,069.10 is: 129,839.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,658.90 : 190,004.21 = 94,069.10 : x
  2. Step 2: Convert to fraction form
    137,658.90/190,004.21 = 94,069.10/x
  3. Step 3: Cross multiply
    137,658.90x = 190,004.21 × 94,069.10
  4. Step 4: Simplify right side
    137,658.90x = 17,873,525,035.58
  5. Step 5: Solve for x
    x = 17,873,525,035.58/137,658.90
  6. Step 6: Final answer
    x = 129,839.23

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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.