Home / 102,915.18-154,213.35-71,386.56

Finding the Fourth Proportional to 102,915.18, 154,213.35 and 71,386.56

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Solution

The fourth proportional to 102,915.18, 154,213.35 and 71,386.56 is: 106,969.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,915.18 : 154,213.35 = 71,386.56 : x
  2. Step 2: Convert to fraction form
    102,915.18/154,213.35 = 71,386.56/x
  3. Step 3: Cross multiply
    102,915.18x = 154,213.35 × 71,386.56
  4. Step 4: Simplify right side
    102,915.18x = 11,008,760,562.58
  5. Step 5: Solve for x
    x = 11,008,760,562.58/102,915.18
  6. Step 6: Final answer
    x = 106,969.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.