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Finding the Fourth Proportional to 71,643.67, 98,866.24 and 39,811.75

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Solution

The fourth proportional to 71,643.67, 98,866.24 and 39,811.75 is: 54,939.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,643.67 : 98,866.24 = 39,811.75 : x
  2. Step 2: Convert to fraction form
    71,643.67/98,866.24 = 39,811.75/x
  3. Step 3: Cross multiply
    71,643.67x = 98,866.24 × 39,811.75
  4. Step 4: Simplify right side
    71,643.67x = 3,936,038,030.32
  5. Step 5: Solve for x
    x = 3,936,038,030.32/71,643.67
  6. Step 6: Final answer
    x = 54,939.09

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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.