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Finding the Fourth Proportional to 122,279.31, 183,700.44 and 86,338.80

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Solution

The fourth proportional to 122,279.31, 183,700.44 and 86,338.80 is: 129,706.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,279.31 : 183,700.44 = 86,338.80 : x
  2. Step 2: Convert to fraction form
    122,279.31/183,700.44 = 86,338.80/x
  3. Step 3: Cross multiply
    122,279.31x = 183,700.44 × 86,338.80
  4. Step 4: Simplify right side
    122,279.31x = 15,860,475,549.07
  5. Step 5: Solve for x
    x = 15,860,475,549.07/122,279.31
  6. Step 6: Final answer
    x = 129,706.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.