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Finding the Fourth Proportional to 47,118, 64,995.60 and 28,244.20

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Solution

The fourth proportional to 47,118, 64,995.60 and 28,244.20 is: 38,960.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,118 : 64,995.60 = 28,244.20 : x
  2. Step 2: Convert to fraction form
    47,118/64,995.60 = 28,244.20/x
  3. Step 3: Cross multiply
    47,118x = 64,995.60 × 28,244.20
  4. Step 4: Simplify right side
    47,118x = 1,835,748,725.52
  5. Step 5: Solve for x
    x = 1,835,748,725.52/47,118
  6. Step 6: Final answer
    x = 38,960.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.