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Finding the Fourth Proportional to 140,941.60, 211,412.40 and 85,645.60

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Solution

The fourth proportional to 140,941.60, 211,412.40 and 85,645.60 is: 128,468.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,941.60 : 211,412.40 = 85,645.60 : x
  2. Step 2: Convert to fraction form
    140,941.60/211,412.40 = 85,645.60/x
  3. Step 3: Cross multiply
    140,941.60x = 211,412.40 × 85,645.60
  4. Step 4: Simplify right side
    140,941.60x = 18,106,541,845.44
  5. Step 5: Solve for x
    x = 18,106,541,845.44/140,941.60
  6. Step 6: Final answer
    x = 128,468.40

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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.