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Finding the Fourth Proportional to 100,368.66, 138,508.56 and 57,927.18

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Solution

The fourth proportional to 100,368.66, 138,508.56 and 57,927.18 is: 79,939.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,368.66 : 138,508.56 = 57,927.18 : x
  2. Step 2: Convert to fraction form
    100,368.66/138,508.56 = 57,927.18/x
  3. Step 3: Cross multiply
    100,368.66x = 138,508.56 × 57,927.18
  4. Step 4: Simplify right side
    100,368.66x = 8,023,410,286.66
  5. Step 5: Solve for x
    x = 8,023,410,286.66/100,368.66
  6. Step 6: Final answer
    x = 79,939.40

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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.