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Finding the Fourth Proportional to 149,090.67, 205,750.53 and 85,440.78

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Solution

The fourth proportional to 149,090.67, 205,750.53 and 85,440.78 is: 117,911.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,090.67 : 205,750.53 = 85,440.78 : x
  2. Step 2: Convert to fraction form
    149,090.67/205,750.53 = 85,440.78/x
  3. Step 3: Cross multiply
    149,090.67x = 205,750.53 × 85,440.78
  4. Step 4: Simplify right side
    149,090.67x = 17,579,485,768.61
  5. Step 5: Solve for x
    x = 17,579,485,768.61/149,090.67
  6. Step 6: Final answer
    x = 117,911.37

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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.