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Finding the Fourth Proportional to 75,428.80, 113,216.10 and 45,904.30

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Solution

The fourth proportional to 75,428.80, 113,216.10 and 45,904.30 is: 68,900.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,428.80 : 113,216.10 = 45,904.30 : x
  2. Step 2: Convert to fraction form
    75,428.80/113,216.10 = 45,904.30/x
  3. Step 3: Cross multiply
    75,428.80x = 113,216.10 × 45,904.30
  4. Step 4: Simplify right side
    75,428.80x = 5,197,105,819.23
  5. Step 5: Solve for x
    x = 5,197,105,819.23/75,428.80
  6. Step 6: Final answer
    x = 68,900.82

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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.