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Finding the Fourth Proportional to 75,459.28, 113,188.80 and 20,055.28

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Solution

The fourth proportional to 75,459.28, 113,188.80 and 20,055.28 is: 30,082.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,459.28 : 113,188.80 = 20,055.28 : x
  2. Step 2: Convert to fraction form
    75,459.28/113,188.80 = 20,055.28/x
  3. Step 3: Cross multiply
    75,459.28x = 113,188.80 × 20,055.28
  4. Step 4: Simplify right side
    75,459.28x = 2,270,033,076.86
  5. Step 5: Solve for x
    x = 2,270,033,076.86/75,459.28
  6. Step 6: Final answer
    x = 30,082.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.