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Finding the Fourth Proportional to 136,712.04, 188,662.38 and 76,279

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Solution

The fourth proportional to 136,712.04, 188,662.38 and 76,279 is: 105,264.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,712.04 : 188,662.38 = 76,279 : x
  2. Step 2: Convert to fraction form
    136,712.04/188,662.38 = 76,279/x
  3. Step 3: Cross multiply
    136,712.04x = 188,662.38 × 76,279
  4. Step 4: Simplify right side
    136,712.04x = 14,390,977,684.02
  5. Step 5: Solve for x
    x = 14,390,977,684.02/136,712.04
  6. Step 6: Final answer
    x = 105,264.89

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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.