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Finding the Fourth Proportional to 65,561.81, 90,516.69 and 45,411.44

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Solution

The fourth proportional to 65,561.81, 90,516.69 and 45,411.44 is: 62,696.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,561.81 : 90,516.69 = 45,411.44 : x
  2. Step 2: Convert to fraction form
    65,561.81/90,516.69 = 45,411.44/x
  3. Step 3: Cross multiply
    65,561.81x = 90,516.69 × 45,411.44
  4. Step 4: Simplify right side
    65,561.81x = 4,110,492,784.35
  5. Step 5: Solve for x
    x = 4,110,492,784.35/65,561.81
  6. Step 6: Final answer
    x = 62,696.46

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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.