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Finding the Fourth Proportional to 66,316.34, 91,489.51 and 40,815.01

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Solution

The fourth proportional to 66,316.34, 91,489.51 and 40,815.01 is: 56,308.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,316.34 : 91,489.51 = 40,815.01 : x
  2. Step 2: Convert to fraction form
    66,316.34/91,489.51 = 40,815.01/x
  3. Step 3: Cross multiply
    66,316.34x = 91,489.51 × 40,815.01
  4. Step 4: Simplify right side
    66,316.34x = 3,734,145,430.93
  5. Step 5: Solve for x
    x = 3,734,145,430.93/66,316.34
  6. Step 6: Final answer
    x = 56,308.07

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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.