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Finding the Fourth Proportional to 47,275.92, 70,788.60 and 28,530.90

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Solution

The fourth proportional to 47,275.92, 70,788.60 and 28,530.90 is: 42,720.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,275.92 : 70,788.60 = 28,530.90 : x
  2. Step 2: Convert to fraction form
    47,275.92/70,788.60 = 28,530.90/x
  3. Step 3: Cross multiply
    47,275.92x = 70,788.60 × 28,530.90
  4. Step 4: Simplify right side
    47,275.92x = 2,019,662,467.74
  5. Step 5: Solve for x
    x = 2,019,662,467.74/47,275.92
  6. Step 6: Final answer
    x = 42,720.74

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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.