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Finding the Fourth Proportional to 100,359.34, 138,495.52 and 55,036.16

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Solution

The fourth proportional to 100,359.34, 138,495.52 and 55,036.16 is: 75,949.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,359.34 : 138,495.52 = 55,036.16 : x
  2. Step 2: Convert to fraction form
    100,359.34/138,495.52 = 55,036.16/x
  3. Step 3: Cross multiply
    100,359.34x = 138,495.52 × 55,036.16
  4. Step 4: Simplify right side
    100,359.34x = 7,622,261,493.68
  5. Step 5: Solve for x
    x = 7,622,261,493.68/100,359.34
  6. Step 6: Final answer
    x = 75,949.70

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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.