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Finding the Fourth Proportional to 47,280.20, 70,920.30 and 42,906.20

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Solution

The fourth proportional to 47,280.20, 70,920.30 and 42,906.20 is: 64,359.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,280.20 : 70,920.30 = 42,906.20 : x
  2. Step 2: Convert to fraction form
    47,280.20/70,920.30 = 42,906.20/x
  3. Step 3: Cross multiply
    47,280.20x = 70,920.30 × 42,906.20
  4. Step 4: Simplify right side
    47,280.20x = 3,042,920,575.86
  5. Step 5: Solve for x
    x = 3,042,920,575.86/47,280.20
  6. Step 6: Final answer
    x = 64,359.30

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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.