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Finding the Fourth Proportional to 122,345.98, 168,860.50 and 79,830.70

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Solution

The fourth proportional to 122,345.98, 168,860.50 and 79,830.70 is: 110,181.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,345.98 : 168,860.50 = 79,830.70 : x
  2. Step 2: Convert to fraction form
    122,345.98/168,860.50 = 79,830.70/x
  3. Step 3: Cross multiply
    122,345.98x = 168,860.50 × 79,830.70
  4. Step 4: Simplify right side
    122,345.98x = 13,480,251,295.62
  5. Step 5: Solve for x
    x = 13,480,251,295.62/122,345.98
  6. Step 6: Final answer
    x = 110,181.40

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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.