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Finding the Fourth Proportional to 75,457.28, 113,185.80 and 20,053.28

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Solution

The fourth proportional to 75,457.28, 113,185.80 and 20,053.28 is: 30,079.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,457.28 : 113,185.80 = 20,053.28 : x
  2. Step 2: Convert to fraction form
    75,457.28/113,185.80 = 20,053.28/x
  3. Step 3: Cross multiply
    75,457.28x = 113,185.80 × 20,053.28
  4. Step 4: Simplify right side
    75,457.28x = 2,269,746,539.42
  5. Step 5: Solve for x
    x = 2,269,746,539.42/75,457.28
  6. Step 6: Final answer
    x = 30,079.89

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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.