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Finding the Fourth Proportional to 136,698.55, 188,643.74 and 76,265.60

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Solution

The fourth proportional to 136,698.55, 188,643.74 and 76,265.60 is: 105,246.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,698.55 : 188,643.74 = 76,265.60 : x
  2. Step 2: Convert to fraction form
    136,698.55/188,643.74 = 76,265.60/x
  3. Step 3: Cross multiply
    136,698.55x = 188,643.74 × 76,265.60
  4. Step 4: Simplify right side
    136,698.55x = 14,387,026,692.80
  5. Step 5: Solve for x
    x = 14,387,026,692.80/136,698.55
  6. Step 6: Final answer
    x = 105,246.38

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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.