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Finding the Fourth Proportional to 156,369.42, 215,790.14 and 84,749.42

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Solution

The fourth proportional to 156,369.42, 215,790.14 and 84,749.42 is: 116,954.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,369.42 : 215,790.14 = 84,749.42 : x
  2. Step 2: Convert to fraction form
    156,369.42/215,790.14 = 84,749.42/x
  3. Step 3: Cross multiply
    156,369.42x = 215,790.14 × 84,749.42
  4. Step 4: Simplify right side
    156,369.42x = 18,288,089,958.07
  5. Step 5: Solve for x
    x = 18,288,089,958.07/156,369.42
  6. Step 6: Final answer
    x = 116,954.39

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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.