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Finding the Fourth Proportional to 148,881.67, 205,465.89 and 85,218.10

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Solution

The fourth proportional to 148,881.67, 205,465.89 and 85,218.10 is: 117,606.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,881.67 : 205,465.89 = 85,218.10 : x
  2. Step 2: Convert to fraction form
    148,881.67/205,465.89 = 85,218.10/x
  3. Step 3: Cross multiply
    148,881.67x = 205,465.89 × 85,218.10
  4. Step 4: Simplify right side
    148,881.67x = 17,509,412,760.61
  5. Step 5: Solve for x
    x = 17,509,412,760.61/148,881.67
  6. Step 6: Final answer
    x = 117,606.24

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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.