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Finding the Fourth Proportional to 104,628.30, 156,978.90 and 45,506.40

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Solution

The fourth proportional to 104,628.30, 156,978.90 and 45,506.40 is: 68,275.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,628.30 : 156,978.90 = 45,506.40 : x
  2. Step 2: Convert to fraction form
    104,628.30/156,978.90 = 45,506.40/x
  3. Step 3: Cross multiply
    104,628.30x = 156,978.90 × 45,506.40
  4. Step 4: Simplify right side
    104,628.30x = 7,143,544,614.96
  5. Step 5: Solve for x
    x = 7,143,544,614.96/104,628.30
  6. Step 6: Final answer
    x = 68,275.45

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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.