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Finding the Fourth Proportional to 139,737.86, 192,411.14 and 105,332.57

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Solution

The fourth proportional to 139,737.86, 192,411.14 and 105,332.57 is: 145,036.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,737.86 : 192,411.14 = 105,332.57 : x
  2. Step 2: Convert to fraction form
    139,737.86/192,411.14 = 105,332.57/x
  3. Step 3: Cross multiply
    139,737.86x = 192,411.14 × 105,332.57
  4. Step 4: Simplify right side
    139,737.86x = 20,267,158,384.11
  5. Step 5: Solve for x
    x = 20,267,158,384.11/139,737.86
  6. Step 6: Final answer
    x = 145,036.99

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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.