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Finding the Fourth Proportional to 136,883.98, 188,897.90 and 76,455.48

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Solution

The fourth proportional to 136,883.98, 188,897.90 and 76,455.48 is: 105,507.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,883.98 : 188,897.90 = 76,455.48 : x
  2. Step 2: Convert to fraction form
    136,883.98/188,897.90 = 76,455.48/x
  3. Step 3: Cross multiply
    136,883.98x = 188,897.90 × 76,455.48
  4. Step 4: Simplify right side
    136,883.98x = 14,442,279,615.49
  5. Step 5: Solve for x
    x = 14,442,279,615.49/136,883.98
  6. Step 6: Final answer
    x = 105,507.45

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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.