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Finding the Fourth Proportional to 212,870.76, 293,729.67 and 122,230.68

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Solution

The fourth proportional to 212,870.76, 293,729.67 and 122,230.68 is: 168,659.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,870.76 : 293,729.67 = 122,230.68 : x
  2. Step 2: Convert to fraction form
    212,870.76/293,729.67 = 122,230.68/x
  3. Step 3: Cross multiply
    212,870.76x = 293,729.67 × 122,230.68
  4. Step 4: Simplify right side
    212,870.76x = 35,902,777,300.28
  5. Step 5: Solve for x
    x = 35,902,777,300.28/212,870.76
  6. Step 6: Final answer
    x = 168,659.98

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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.