Home / 109,107.28-149,915.54-86,712.40

Finding the Fourth Proportional to 109,107.28, 149,915.54 and 86,712.40

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Solution

The fourth proportional to 109,107.28, 149,915.54 and 86,712.40 is: 119,144.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,107.28 : 149,915.54 = 86,712.40 : x
  2. Step 2: Convert to fraction form
    109,107.28/149,915.54 = 86,712.40/x
  3. Step 3: Cross multiply
    109,107.28x = 149,915.54 × 86,712.40
  4. Step 4: Simplify right side
    109,107.28x = 12,999,536,270.70
  5. Step 5: Solve for x
    x = 12,999,536,270.70/109,107.28
  6. Step 6: Final answer
    x = 119,144.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.