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Finding the Fourth Proportional to 65,469.86, 90,345.87 and 40,018.84

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Solution

The fourth proportional to 65,469.86, 90,345.87 and 40,018.84 is: 55,224.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,469.86 : 90,345.87 = 40,018.84 : x
  2. Step 2: Convert to fraction form
    65,469.86/90,345.87 = 40,018.84/x
  3. Step 3: Cross multiply
    65,469.86x = 90,345.87 × 40,018.84
  4. Step 4: Simplify right side
    65,469.86x = 3,615,536,916.19
  5. Step 5: Solve for x
    x = 3,615,536,916.19/65,469.86
  6. Step 6: Final answer
    x = 55,224.45

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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.