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Finding the Fourth Proportional to 100,294.79, 138,405.57 and 54,353.45

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Solution

The fourth proportional to 100,294.79, 138,405.57 and 54,353.45 is: 75,007.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,294.79 : 138,405.57 = 54,353.45 : x
  2. Step 2: Convert to fraction form
    100,294.79/138,405.57 = 54,353.45/x
  3. Step 3: Cross multiply
    100,294.79x = 138,405.57 × 54,353.45
  4. Step 4: Simplify right side
    100,294.79x = 7,522,819,536.69
  5. Step 5: Solve for x
    x = 7,522,819,536.69/100,294.79
  6. Step 6: Final answer
    x = 75,007.08

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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.