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Finding the Fourth Proportional to 65,741.84, 90,730.12 and 38,892.98

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Solution

The fourth proportional to 65,741.84, 90,730.12 and 38,892.98 is: 53,676.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,741.84 : 90,730.12 = 38,892.98 : x
  2. Step 2: Convert to fraction form
    65,741.84/90,730.12 = 38,892.98/x
  3. Step 3: Cross multiply
    65,741.84x = 90,730.12 × 38,892.98
  4. Step 4: Simplify right side
    65,741.84x = 3,528,764,742.56
  5. Step 5: Solve for x
    x = 3,528,764,742.56/65,741.84
  6. Step 6: Final answer
    x = 53,676.09

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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.