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Finding the Fourth Proportional to 154,656, 213,390.72 and 90,996.48

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Solution

The fourth proportional to 154,656, 213,390.72 and 90,996.48 is: 125,554.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,656 : 213,390.72 = 90,996.48 : x
  2. Step 2: Convert to fraction form
    154,656/213,390.72 = 90,996.48/x
  3. Step 3: Cross multiply
    154,656x = 213,390.72 × 90,996.48
  4. Step 4: Simplify right side
    154,656x = 19,417,804,384.67
  5. Step 5: Solve for x
    x = 19,417,804,384.67/154,656
  6. Step 6: Final answer
    x = 125,554.81

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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.