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Finding the Fourth Proportional to 139,956.78, 192,987.90 and 94,555.92

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Solution

The fourth proportional to 139,956.78, 192,987.90 and 94,555.92 is: 130,384.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,956.78 : 192,987.90 = 94,555.92 : x
  2. Step 2: Convert to fraction form
    139,956.78/192,987.90 = 94,555.92/x
  3. Step 3: Cross multiply
    139,956.78x = 192,987.90 × 94,555.92
  4. Step 4: Simplify right side
    139,956.78x = 18,248,148,433.37
  5. Step 5: Solve for x
    x = 18,248,148,433.37/139,956.78
  6. Step 6: Final answer
    x = 130,384.17

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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.