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Finding the Fourth Proportional to 122,755.47, 169,425.84 and 76,836.42

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Solution

The fourth proportional to 122,755.47, 169,425.84 and 76,836.42 is: 106,048.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,755.47 : 169,425.84 = 76,836.42 : x
  2. Step 2: Convert to fraction form
    122,755.47/169,425.84 = 76,836.42/x
  3. Step 3: Cross multiply
    122,755.47x = 169,425.84 × 76,836.42
  4. Step 4: Simplify right side
    122,755.47x = 13,018,075,001.09
  5. Step 5: Solve for x
    x = 13,018,075,001.09/122,755.47
  6. Step 6: Final answer
    x = 106,048.84

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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.