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Finding the Fourth Proportional to 212,138.97, 292,815.03 and 139,597.80

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Solution

The fourth proportional to 212,138.97, 292,815.03 and 139,597.80 is: 192,686.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,138.97 : 292,815.03 = 139,597.80 : x
  2. Step 2: Convert to fraction form
    212,138.97/292,815.03 = 139,597.80/x
  3. Step 3: Cross multiply
    212,138.97x = 292,815.03 × 139,597.80
  4. Step 4: Simplify right side
    212,138.97x = 40,876,333,994.93
  5. Step 5: Solve for x
    x = 40,876,333,994.93/212,138.97
  6. Step 6: Final answer
    x = 192,686.59

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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.