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Finding the Fourth Proportional to 91,479.70, 137,110.20 and 47,083.60

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Solution

The fourth proportional to 91,479.70, 137,110.20 and 47,083.60 is: 70,569.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,479.70 : 137,110.20 = 47,083.60 : x
  2. Step 2: Convert to fraction form
    91,479.70/137,110.20 = 47,083.60/x
  3. Step 3: Cross multiply
    91,479.70x = 137,110.20 × 47,083.60
  4. Step 4: Simplify right side
    91,479.70x = 6,455,641,812.72
  5. Step 5: Solve for x
    x = 6,455,641,812.72/91,479.70
  6. Step 6: Final answer
    x = 70,569.12

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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.