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Finding the Fourth Proportional to 47,288.40, 70,932.60 and 42,987.60

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Solution

The fourth proportional to 47,288.40, 70,932.60 and 42,987.60 is: 64,481.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,288.40 : 70,932.60 = 42,987.60 : x
  2. Step 2: Convert to fraction form
    47,288.40/70,932.60 = 42,987.60/x
  3. Step 3: Cross multiply
    47,288.40x = 70,932.60 × 42,987.60
  4. Step 4: Simplify right side
    47,288.40x = 3,049,222,235.76
  5. Step 5: Solve for x
    x = 3,049,222,235.76/47,288.40
  6. Step 6: Final answer
    x = 64,481.40

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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.