Home / 136,778.39-188,753.66-76,348.50

Finding the Fourth Proportional to 136,778.39, 188,753.66 and 76,348.50

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Solution

The fourth proportional to 136,778.39, 188,753.66 and 76,348.50 is: 105,360.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,778.39 : 188,753.66 = 76,348.50 : x
  2. Step 2: Convert to fraction form
    136,778.39/188,753.66 = 76,348.50/x
  3. Step 3: Cross multiply
    136,778.39x = 188,753.66 × 76,348.50
  4. Step 4: Simplify right side
    136,778.39x = 14,411,058,810.51
  5. Step 5: Solve for x
    x = 14,411,058,810.51/136,778.39
  6. Step 6: Final answer
    x = 105,360.64

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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.