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Finding the Fourth Proportional to 64,630.63, 96,947.16 and 20,256.40

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Solution

The fourth proportional to 64,630.63, 96,947.16 and 20,256.40 is: 30,384.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,630.63 : 96,947.16 = 20,256.40 : x
  2. Step 2: Convert to fraction form
    64,630.63/96,947.16 = 20,256.40/x
  3. Step 3: Cross multiply
    64,630.63x = 96,947.16 × 20,256.40
  4. Step 4: Simplify right side
    64,630.63x = 1,963,800,451.82
  5. Step 5: Solve for x
    x = 1,963,800,451.82/64,630.63
  6. Step 6: Final answer
    x = 30,384.98

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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.