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Finding the Fourth Proportional to 139,737.57, 192,831.46 and 76,075.21

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Solution

The fourth proportional to 139,737.57, 192,831.46 and 76,075.21 is: 104,980.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,737.57 : 192,831.46 = 76,075.21 : x
  2. Step 2: Convert to fraction form
    139,737.57/192,831.46 = 76,075.21/x
  3. Step 3: Cross multiply
    139,737.57x = 192,831.46 × 76,075.21
  4. Step 4: Simplify right side
    139,737.57x = 14,669,693,814.11
  5. Step 5: Solve for x
    x = 14,669,693,814.11/139,737.57
  6. Step 6: Final answer
    x = 104,980.31

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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.