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Finding the Fourth Proportional to 139,620.36, 192,670.02 and 77,526.98

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Solution

The fourth proportional to 139,620.36, 192,670.02 and 77,526.98 is: 106,983.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,620.36 : 192,670.02 = 77,526.98 : x
  2. Step 2: Convert to fraction form
    139,620.36/192,670.02 = 77,526.98/x
  3. Step 3: Cross multiply
    139,620.36x = 192,670.02 × 77,526.98
  4. Step 4: Simplify right side
    139,620.36x = 14,937,124,787.14
  5. Step 5: Solve for x
    x = 14,937,124,787.14/139,620.36
  6. Step 6: Final answer
    x = 106,983.86

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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.