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Finding the Fourth Proportional to 203,487.90, 305,158.95 and 103,614.90

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Solution

The fourth proportional to 203,487.90, 305,158.95 and 103,614.90 is: 155,385.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,487.90 : 305,158.95 = 103,614.90 : x
  2. Step 2: Convert to fraction form
    203,487.90/305,158.95 = 103,614.90/x
  3. Step 3: Cross multiply
    203,487.90x = 305,158.95 × 103,614.90
  4. Step 4: Simplify right side
    203,487.90x = 31,619,014,088.36
  5. Step 5: Solve for x
    x = 31,619,014,088.36/203,487.90
  6. Step 6: Final answer
    x = 155,385.23

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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.