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Finding the Fourth Proportional to 65,921.48, 90,955.88 and 39,059.34

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Solution

The fourth proportional to 65,921.48, 90,955.88 and 39,059.34 is: 53,892.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,921.48 : 90,955.88 = 39,059.34 : x
  2. Step 2: Convert to fraction form
    65,921.48/90,955.88 = 39,059.34/x
  3. Step 3: Cross multiply
    65,921.48x = 90,955.88 × 39,059.34
  4. Step 4: Simplify right side
    65,921.48x = 3,552,676,446.62
  5. Step 5: Solve for x
    x = 3,552,676,446.62/65,921.48
  6. Step 6: Final answer
    x = 53,892.55

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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.