Home / 78,476.90-108,321.58-51,640.10

Finding the Fourth Proportional to 78,476.90, 108,321.58 and 51,640.10

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Solution

The fourth proportional to 78,476.90, 108,321.58 and 51,640.10 is: 71,278.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,476.90 : 108,321.58 = 51,640.10 : x
  2. Step 2: Convert to fraction form
    78,476.90/108,321.58 = 51,640.10/x
  3. Step 3: Cross multiply
    78,476.90x = 108,321.58 × 51,640.10
  4. Step 4: Simplify right side
    78,476.90x = 5,593,737,223.36
  5. Step 5: Solve for x
    x = 5,593,737,223.36/78,476.90
  6. Step 6: Final answer
    x = 71,278.77

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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.