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Finding the Fourth Proportional to 61,290.74, 91,775.70 and 40,164.32

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Solution

The fourth proportional to 61,290.74, 91,775.70 and 40,164.32 is: 60,141.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,290.74 : 91,775.70 = 40,164.32 : x
  2. Step 2: Convert to fraction form
    61,290.74/91,775.70 = 40,164.32/x
  3. Step 3: Cross multiply
    61,290.74x = 91,775.70 × 40,164.32
  4. Step 4: Simplify right side
    61,290.74x = 3,686,108,124.15
  5. Step 5: Solve for x
    x = 3,686,108,124.15/61,290.74
  6. Step 6: Final answer
    x = 60,141.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.