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Finding the Fourth Proportional to 65,460.44, 90,333.05 and 40,009.40

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Solution

The fourth proportional to 65,460.44, 90,333.05 and 40,009.40 is: 55,211.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,460.44 : 90,333.05 = 40,009.40 : x
  2. Step 2: Convert to fraction form
    65,460.44/90,333.05 = 40,009.40/x
  3. Step 3: Cross multiply
    65,460.44x = 90,333.05 × 40,009.40
  4. Step 4: Simplify right side
    65,460.44x = 3,614,170,930.62
  5. Step 5: Solve for x
    x = 3,614,170,930.62/65,460.44
  6. Step 6: Final answer
    x = 55,211.53

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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.