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Finding the Fourth Proportional to 139,403.94, 209,088.14 and 44,643.96

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Solution

The fourth proportional to 139,403.94, 209,088.14 and 44,643.96 is: 66,960.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,403.94 : 209,088.14 = 44,643.96 : x
  2. Step 2: Convert to fraction form
    139,403.94/209,088.14 = 44,643.96/x
  3. Step 3: Cross multiply
    139,403.94x = 209,088.14 × 44,643.96
  4. Step 4: Simplify right side
    139,403.94x = 9,334,522,335.41
  5. Step 5: Solve for x
    x = 9,334,522,335.41/139,403.94
  6. Step 6: Final answer
    x = 66,960.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.