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Finding the Fourth Proportional to 153,558.78, 211,830.15 and 105,729.09

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Solution

The fourth proportional to 153,558.78, 211,830.15 and 105,729.09 is: 145,850.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,558.78 : 211,830.15 = 105,729.09 : x
  2. Step 2: Convert to fraction form
    153,558.78/211,830.15 = 105,729.09/x
  3. Step 3: Cross multiply
    153,558.78x = 211,830.15 × 105,729.09
  4. Step 4: Simplify right side
    153,558.78x = 22,396,608,994.06
  5. Step 5: Solve for x
    x = 22,396,608,994.06/153,558.78
  6. Step 6: Final answer
    x = 145,850.40

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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.