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Finding the Fourth Proportional to 143,893.60, 215,840.40 and 130,991.20

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Solution

The fourth proportional to 143,893.60, 215,840.40 and 130,991.20 is: 196,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,893.60 : 215,840.40 = 130,991.20 : x
  2. Step 2: Convert to fraction form
    143,893.60/215,840.40 = 130,991.20/x
  3. Step 3: Cross multiply
    143,893.60x = 215,840.40 × 130,991.20
  4. Step 4: Simplify right side
    143,893.60x = 28,273,193,004.48
  5. Step 5: Solve for x
    x = 28,273,193,004.48/143,893.60
  6. Step 6: Final answer
    x = 196,486.80

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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.