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Finding the Fourth Proportional to 153,999.20, 215,074 and 153,999.20

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Solution

The fourth proportional to 153,999.20, 215,074 and 153,999.20 is: 215,074

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,999.20 : 215,074 = 153,999.20 : x
  2. Step 2: Convert to fraction form
    153,999.20/215,074 = 153,999.20/x
  3. Step 3: Cross multiply
    153,999.20x = 215,074 × 153,999.20
  4. Step 4: Simplify right side
    153,999.20x = 33,121,223,940.80
  5. Step 5: Solve for x
    x = 33,121,223,940.80/153,999.20
  6. Step 6: Final answer
    x = 215,074

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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.