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Finding the Fourth Proportional to 100,252.40, 138,346.80 and 54,930.20

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Solution

The fourth proportional to 100,252.40, 138,346.80 and 54,930.20 is: 75,802.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,252.40 : 138,346.80 = 54,930.20 : x
  2. Step 2: Convert to fraction form
    100,252.40/138,346.80 = 54,930.20/x
  3. Step 3: Cross multiply
    100,252.40x = 138,346.80 × 54,930.20
  4. Step 4: Simplify right side
    100,252.40x = 7,599,417,393.36
  5. Step 5: Solve for x
    x = 7,599,417,393.36/100,252.40
  6. Step 6: Final answer
    x = 75,802.85

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1.5x scale

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.