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Finding the Fourth Proportional to 122,019.76, 168,390.12 and 68,303.44

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Solution

The fourth proportional to 122,019.76, 168,390.12 and 68,303.44 is: 94,260.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,019.76 : 168,390.12 = 68,303.44 : x
  2. Step 2: Convert to fraction form
    122,019.76/168,390.12 = 68,303.44/x
  3. Step 3: Cross multiply
    122,019.76x = 168,390.12 × 68,303.44
  4. Step 4: Simplify right side
    122,019.76x = 11,501,624,458.01
  5. Step 5: Solve for x
    x = 11,501,624,458.01/122,019.76
  6. Step 6: Final answer
    x = 94,260.34

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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.