Home / 118,638.08-163,649.40-78,351.92

Finding the Fourth Proportional to 118,638.08, 163,649.40 and 78,351.92

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Solution

The fourth proportional to 118,638.08, 163,649.40 and 78,351.92 is: 108,078.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,638.08 : 163,649.40 = 78,351.92 : x
  2. Step 2: Convert to fraction form
    118,638.08/163,649.40 = 78,351.92/x
  3. Step 3: Cross multiply
    118,638.08x = 163,649.40 × 78,351.92
  4. Step 4: Simplify right side
    118,638.08x = 12,822,244,696.85
  5. Step 5: Solve for x
    x = 12,822,244,696.85/118,638.08
  6. Step 6: Final answer
    x = 108,078.66

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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.