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Finding the Fourth Proportional to 153,959.20, 215,018 and 153,959.20

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Solution

The fourth proportional to 153,959.20, 215,018 and 153,959.20 is: 215,018

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,959.20 : 215,018 = 153,959.20 : x
  2. Step 2: Convert to fraction form
    153,959.20/215,018 = 153,959.20/x
  3. Step 3: Cross multiply
    153,959.20x = 215,018 × 153,959.20
  4. Step 4: Simplify right side
    153,959.20x = 33,103,999,265.60
  5. Step 5: Solve for x
    x = 33,103,999,265.60/153,959.20
  6. Step 6: Final answer
    x = 215,018

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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.