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Finding the Fourth Proportional to 114,420.20, 171,630.30 and 79,428.20

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Solution

The fourth proportional to 114,420.20, 171,630.30 and 79,428.20 is: 119,142.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,420.20 : 171,630.30 = 79,428.20 : x
  2. Step 2: Convert to fraction form
    114,420.20/171,630.30 = 79,428.20/x
  3. Step 3: Cross multiply
    114,420.20x = 171,630.30 × 79,428.20
  4. Step 4: Simplify right side
    114,420.20x = 13,632,285,794.46
  5. Step 5: Solve for x
    x = 13,632,285,794.46/114,420.20
  6. Step 6: Final answer
    x = 119,142.30

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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.