Home / 135,300.90-186,752.76-78,723.20

Finding the Fourth Proportional to 135,300.90, 186,752.76 and 78,723.20

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Solution

The fourth proportional to 135,300.90, 186,752.76 and 78,723.20 is: 108,659.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,300.90 : 186,752.76 = 78,723.20 : x
  2. Step 2: Convert to fraction form
    135,300.90/186,752.76 = 78,723.20/x
  3. Step 3: Cross multiply
    135,300.90x = 186,752.76 × 78,723.20
  4. Step 4: Simplify right side
    135,300.90x = 14,701,774,876.03
  5. Step 5: Solve for x
    x = 14,701,774,876.03/135,300.90
  6. Step 6: Final answer
    x = 108,659.85

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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.