Home / 148,915.40-205,431.66-85,215.38

Finding the Fourth Proportional to 148,915.40, 205,431.66 and 85,215.38

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Solution

The fourth proportional to 148,915.40, 205,431.66 and 85,215.38 is: 117,556.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,915.40 : 205,431.66 = 85,215.38 : x
  2. Step 2: Convert to fraction form
    148,915.40/205,431.66 = 85,215.38/x
  3. Step 3: Cross multiply
    148,915.40x = 205,431.66 × 85,215.38
  4. Step 4: Simplify right side
    148,915.40x = 17,505,935,943.77
  5. Step 5: Solve for x
    x = 17,505,935,943.77/148,915.40
  6. Step 6: Final answer
    x = 117,556.25

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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.