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Finding the Fourth Proportional to 178,100.20, 245,679.78 and 121,594.60

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Solution

The fourth proportional to 178,100.20, 245,679.78 and 121,594.60 is: 167,733.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,100.20 : 245,679.78 = 121,594.60 : x
  2. Step 2: Convert to fraction form
    178,100.20/245,679.78 = 121,594.60/x
  3. Step 3: Cross multiply
    178,100.20x = 245,679.78 × 121,594.60
  4. Step 4: Simplify right side
    178,100.20x = 29,873,334,577.19
  5. Step 5: Solve for x
    x = 29,873,334,577.19/178,100.20
  6. Step 6: Final answer
    x = 167,733.30

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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.