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Finding the Fourth Proportional to 300,006.20, 450,014.10 and 78,390.20

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Solution

The fourth proportional to 300,006.20, 450,014.10 and 78,390.20 is: 117,586.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,006.20 : 450,014.10 = 78,390.20 : x
  2. Step 2: Convert to fraction form
    300,006.20/450,014.10 = 78,390.20/x
  3. Step 3: Cross multiply
    300,006.20x = 450,014.10 × 78,390.20
  4. Step 4: Simplify right side
    300,006.20x = 35,276,695,301.82
  5. Step 5: Solve for x
    x = 35,276,695,301.82/300,006.20
  6. Step 6: Final answer
    x = 117,586.55

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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.