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Finding the Fourth Proportional to 30,139.30, 45,200.85 and 9,079.30

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Solution

The fourth proportional to 30,139.30, 45,200.85 and 9,079.30 is: 13,616.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,139.30 : 45,200.85 = 9,079.30 : x
  2. Step 2: Convert to fraction form
    30,139.30/45,200.85 = 9,079.30/x
  3. Step 3: Cross multiply
    30,139.30x = 45,200.85 × 9,079.30
  4. Step 4: Simplify right side
    30,139.30x = 410,392,077.41
  5. Step 5: Solve for x
    x = 410,392,077.41/30,139.30
  6. Step 6: Final answer
    x = 13,616.51

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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.