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Finding the Fourth Proportional to 139,737.90, 192,832.11 and 76,075.86

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Solution

The fourth proportional to 139,737.90, 192,832.11 and 76,075.86 is: 104,981.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,737.90 : 192,832.11 = 76,075.86 : x
  2. Step 2: Convert to fraction form
    139,737.90/192,832.11 = 76,075.86/x
  3. Step 3: Cross multiply
    139,737.90x = 192,832.11 × 76,075.86
  4. Step 4: Simplify right side
    139,737.90x = 14,669,868,603.86
  5. Step 5: Solve for x
    x = 14,669,868,603.86/139,737.90
  6. Step 6: Final answer
    x = 104,981.32

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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.