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Finding the Fourth Proportional to 100,334.76, 138,463.52 and 55,016.88

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Solution

The fourth proportional to 100,334.76, 138,463.52 and 55,016.88 is: 75,924.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,334.76 : 138,463.52 = 55,016.88 : x
  2. Step 2: Convert to fraction form
    100,334.76/138,463.52 = 55,016.88/x
  3. Step 3: Cross multiply
    100,334.76x = 138,463.52 × 55,016.88
  4. Step 4: Simplify right side
    100,334.76x = 7,617,830,864.22
  5. Step 5: Solve for x
    x = 7,617,830,864.22/100,334.76
  6. Step 6: Final answer
    x = 75,924.14

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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.