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Finding the Fourth Proportional to 149,161.42, 205,851.95 and 85,508.79

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Solution

The fourth proportional to 149,161.42, 205,851.95 and 85,508.79 is: 118,007.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,161.42 : 205,851.95 = 85,508.79 : x
  2. Step 2: Convert to fraction form
    149,161.42/205,851.95 = 85,508.79/x
  3. Step 3: Cross multiply
    149,161.42x = 205,851.95 × 85,508.79
  4. Step 4: Simplify right side
    149,161.42x = 17,602,151,163.64
  5. Step 5: Solve for x
    x = 17,602,151,163.64/149,161.42
  6. Step 6: Final answer
    x = 118,007.40

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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.