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Finding the Fourth Proportional to 153,641.88, 211,905.60 and 99,944.04

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Solution

The fourth proportional to 153,641.88, 211,905.60 and 99,944.04 is: 137,844.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,641.88 : 211,905.60 = 99,944.04 : x
  2. Step 2: Convert to fraction form
    153,641.88/211,905.60 = 99,944.04/x
  3. Step 3: Cross multiply
    153,641.88x = 211,905.60 × 99,944.04
  4. Step 4: Simplify right side
    153,641.88x = 21,178,701,762.62
  5. Step 5: Solve for x
    x = 21,178,701,762.62/153,641.88
  6. Step 6: Final answer
    x = 137,844.59

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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.