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Finding the Fourth Proportional to 155,109.20, 217,448.13 and 155,109.20

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Solution

The fourth proportional to 155,109.20, 217,448.13 and 155,109.20 is: 217,448.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,109.20 : 217,448.13 = 155,109.20 : x
  2. Step 2: Convert to fraction form
    155,109.20/217,448.13 = 155,109.20/x
  3. Step 3: Cross multiply
    155,109.20x = 217,448.13 × 155,109.20
  4. Step 4: Simplify right side
    155,109.20x = 33,728,205,485.80
  5. Step 5: Solve for x
    x = 33,728,205,485.80/155,109.20
  6. Step 6: Final answer
    x = 217,448.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.