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Finding the Fourth Proportional to 153,840.32, 212,299.62 and 84,929.78

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Solution

The fourth proportional to 153,840.32, 212,299.62 and 84,929.78 is: 117,203.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,840.32 : 212,299.62 = 84,929.78 : x
  2. Step 2: Convert to fraction form
    153,840.32/212,299.62 = 84,929.78/x
  3. Step 3: Cross multiply
    153,840.32x = 212,299.62 × 84,929.78
  4. Step 4: Simplify right side
    153,840.32x = 18,030,560,020.68
  5. Step 5: Solve for x
    x = 18,030,560,020.68/153,840.32
  6. Step 6: Final answer
    x = 117,203.08

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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.