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Finding the Fourth Proportional to 124,643.40, 186,843.60 and 71,280.60

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Solution

The fourth proportional to 124,643.40, 186,843.60 and 71,280.60 is: 106,851.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,643.40 : 186,843.60 = 71,280.60 : x
  2. Step 2: Convert to fraction form
    124,643.40/186,843.60 = 71,280.60/x
  3. Step 3: Cross multiply
    124,643.40x = 186,843.60 × 71,280.60
  4. Step 4: Simplify right side
    124,643.40x = 13,318,323,914.16
  5. Step 5: Solve for x
    x = 13,318,323,914.16/124,643.40
  6. Step 6: Final answer
    x = 106,851.42

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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.