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Finding the Fourth Proportional to 136,314.60, 188,109.54 and 76,687.08

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Solution

The fourth proportional to 136,314.60, 188,109.54 and 76,687.08 is: 105,825.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,314.60 : 188,109.54 = 76,687.08 : x
  2. Step 2: Convert to fraction form
    136,314.60/188,109.54 = 76,687.08/x
  3. Step 3: Cross multiply
    136,314.60x = 188,109.54 × 76,687.08
  4. Step 4: Simplify right side
    136,314.60x = 14,425,571,342.74
  5. Step 5: Solve for x
    x = 14,425,571,342.74/136,314.60
  6. Step 6: Final answer
    x = 105,825.58

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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.