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Finding the Fourth Proportional to 231,785.60, 347,678.40 and 136,918.40

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Solution

The fourth proportional to 231,785.60, 347,678.40 and 136,918.40 is: 205,377.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,785.60 : 347,678.40 = 136,918.40 : x
  2. Step 2: Convert to fraction form
    231,785.60/347,678.40 = 136,918.40/x
  3. Step 3: Cross multiply
    231,785.60x = 347,678.40 × 136,918.40
  4. Step 4: Simplify right side
    231,785.60x = 47,603,570,242.56
  5. Step 5: Solve for x
    x = 47,603,570,242.56/231,785.60
  6. Step 6: Final answer
    x = 205,377.60

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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.