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Finding the Fourth Proportional to 139,326.40, 192,261.36 and 89,020

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Solution

The fourth proportional to 139,326.40, 192,261.36 and 89,020 is: 122,841.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,326.40 : 192,261.36 = 89,020 : x
  2. Step 2: Convert to fraction form
    139,326.40/192,261.36 = 89,020/x
  3. Step 3: Cross multiply
    139,326.40x = 192,261.36 × 89,020
  4. Step 4: Simplify right side
    139,326.40x = 17,115,106,267.20
  5. Step 5: Solve for x
    x = 17,115,106,267.20/139,326.40
  6. Step 6: Final answer
    x = 122,841.80

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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.