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Finding the Fourth Proportional to 153,908.36, 212,396.90 and 84,997.62

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Solution

The fourth proportional to 153,908.36, 212,396.90 and 84,997.62 is: 117,298.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,908.36 : 212,396.90 = 84,997.62 : x
  2. Step 2: Convert to fraction form
    153,908.36/212,396.90 = 84,997.62/x
  3. Step 3: Cross multiply
    153,908.36x = 212,396.90 × 84,997.62
  4. Step 4: Simplify right side
    153,908.36x = 18,053,230,995.38
  5. Step 5: Solve for x
    x = 18,053,230,995.38/153,908.36
  6. Step 6: Final answer
    x = 117,298.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.