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Finding the Fourth Proportional to 153,878.62, 212,358 and 89,343.04

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Solution

The fourth proportional to 153,878.62, 212,358 and 89,343.04 is: 123,296.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,878.62 : 212,358 = 89,343.04 : x
  2. Step 2: Convert to fraction form
    153,878.62/212,358 = 89,343.04/x
  3. Step 3: Cross multiply
    153,878.62x = 212,358 × 89,343.04
  4. Step 4: Simplify right side
    153,878.62x = 18,972,709,288.32
  5. Step 5: Solve for x
    x = 18,972,709,288.32/153,878.62
  6. Step 6: Final answer
    x = 123,296.59

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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.