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Finding the Fourth Proportional to 199,138.60, 298,707.90 and 74,463.40

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Solution

The fourth proportional to 199,138.60, 298,707.90 and 74,463.40 is: 111,695.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,138.60 : 298,707.90 = 74,463.40 : x
  2. Step 2: Convert to fraction form
    199,138.60/298,707.90 = 74,463.40/x
  3. Step 3: Cross multiply
    199,138.60x = 298,707.90 × 74,463.40
  4. Step 4: Simplify right side
    199,138.60x = 22,242,805,840.86
  5. Step 5: Solve for x
    x = 22,242,805,840.86/199,138.60
  6. Step 6: Final answer
    x = 111,695.10

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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.