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Finding the Fourth Proportional to 125,843.60, 188,765.40 and 121,005.20

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Solution

The fourth proportional to 125,843.60, 188,765.40 and 121,005.20 is: 181,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,843.60 : 188,765.40 = 121,005.20 : x
  2. Step 2: Convert to fraction form
    125,843.60/188,765.40 = 121,005.20/x
  3. Step 3: Cross multiply
    125,843.60x = 188,765.40 × 121,005.20
  4. Step 4: Simplify right side
    125,843.60x = 22,841,594,980.08
  5. Step 5: Solve for x
    x = 22,841,594,980.08/125,843.60
  6. Step 6: Final answer
    x = 181,507.80

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1.5x scale

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.