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Finding the Fourth Proportional to 65,959.92, 90,954.90 and 42,087.60

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Solution

The fourth proportional to 65,959.92, 90,954.90 and 42,087.60 is: 58,036.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,959.92 : 90,954.90 = 42,087.60 : x
  2. Step 2: Convert to fraction form
    65,959.92/90,954.90 = 42,087.60/x
  3. Step 3: Cross multiply
    65,959.92x = 90,954.90 × 42,087.60
  4. Step 4: Simplify right side
    65,959.92x = 3,828,073,449.24
  5. Step 5: Solve for x
    x = 3,828,073,449.24/65,959.92
  6. Step 6: Final answer
    x = 58,036.36

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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.