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Finding the Fourth Proportional to 212,844.40, 319,412.40 and 118,074.40

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Solution

The fourth proportional to 212,844.40, 319,412.40 and 118,074.40 is: 177,192.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,844.40 : 319,412.40 = 118,074.40 : x
  2. Step 2: Convert to fraction form
    212,844.40/319,412.40 = 118,074.40/x
  3. Step 3: Cross multiply
    212,844.40x = 319,412.40 × 118,074.40
  4. Step 4: Simplify right side
    212,844.40x = 37,714,427,482.56
  5. Step 5: Solve for x
    x = 37,714,427,482.56/212,844.40
  6. Step 6: Final answer
    x = 177,192.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.