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Finding the Fourth Proportional to 139,403.69, 192,376.59 and 75,740.93

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Solution

The fourth proportional to 139,403.69, 192,376.59 and 75,740.93 is: 104,522.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,403.69 : 192,376.59 = 75,740.93 : x
  2. Step 2: Convert to fraction form
    139,403.69/192,376.59 = 75,740.93/x
  3. Step 3: Cross multiply
    139,403.69x = 192,376.59 × 75,740.93
  4. Step 4: Simplify right side
    139,403.69x = 14,570,781,836.83
  5. Step 5: Solve for x
    x = 14,570,781,836.83/139,403.69
  6. Step 6: Final answer
    x = 104,522.21

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1.5x scale

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.