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Finding the Fourth Proportional to 194,805.60, 292,208.40 and 128,320.80

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Solution

The fourth proportional to 194,805.60, 292,208.40 and 128,320.80 is: 192,481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,805.60 : 292,208.40 = 128,320.80 : x
  2. Step 2: Convert to fraction form
    194,805.60/292,208.40 = 128,320.80/x
  3. Step 3: Cross multiply
    194,805.60x = 292,208.40 × 128,320.80
  4. Step 4: Simplify right side
    194,805.60x = 37,496,415,654.72
  5. Step 5: Solve for x
    x = 37,496,415,654.72/194,805.60
  6. Step 6: Final answer
    x = 192,481.20

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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.