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Finding the Fourth Proportional to 89,124.60, 133,643.70 and 49,639.80

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Solution

The fourth proportional to 89,124.60, 133,643.70 and 49,639.80 is: 74,435.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,124.60 : 133,643.70 = 49,639.80 : x
  2. Step 2: Convert to fraction form
    89,124.60/133,643.70 = 49,639.80/x
  3. Step 3: Cross multiply
    89,124.60x = 133,643.70 × 49,639.80
  4. Step 4: Simplify right side
    89,124.60x = 6,634,046,539.26
  5. Step 5: Solve for x
    x = 6,634,046,539.26/89,124.60
  6. Step 6: Final answer
    x = 74,435.64

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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.