Home / 139,740.86-192,415.28-105,335.57

Finding the Fourth Proportional to 139,740.86, 192,415.28 and 105,335.57

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Solution

The fourth proportional to 139,740.86, 192,415.28 and 105,335.57 is: 145,041.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,740.86 : 192,415.28 = 105,335.57 : x
  2. Step 2: Convert to fraction form
    139,740.86/192,415.28 = 105,335.57/x
  3. Step 3: Cross multiply
    139,740.86x = 192,415.28 × 105,335.57
  4. Step 4: Simplify right side
    139,740.86x = 20,268,171,706.76
  5. Step 5: Solve for x
    x = 20,268,171,706.76/139,740.86
  6. Step 6: Final answer
    x = 145,041.13

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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.