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Finding the Fourth Proportional to 138,802.52, 209,068.36 and 129,069.56

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Solution

The fourth proportional to 138,802.52, 209,068.36 and 129,069.56 is: 194,408.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,802.52 : 209,068.36 = 129,069.56 : x
  2. Step 2: Convert to fraction form
    138,802.52/209,068.36 = 129,069.56/x
  3. Step 3: Cross multiply
    138,802.52x = 209,068.36 × 129,069.56
  4. Step 4: Simplify right side
    138,802.52x = 26,984,361,235.12
  5. Step 5: Solve for x
    x = 26,984,361,235.12/138,802.52
  6. Step 6: Final answer
    x = 194,408.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.