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Finding the Fourth Proportional to 75,985, 104,856.47 and 43,724.60

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Solution

The fourth proportional to 75,985, 104,856.47 and 43,724.60 is: 60,338.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,985 : 104,856.47 = 43,724.60 : x
  2. Step 2: Convert to fraction form
    75,985/104,856.47 = 43,724.60/x
  3. Step 3: Cross multiply
    75,985x = 104,856.47 × 43,724.60
  4. Step 4: Simplify right side
    75,985x = 4,584,806,989.54
  5. Step 5: Solve for x
    x = 4,584,806,989.54/75,985
  6. Step 6: Final answer
    x = 60,338.32

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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.