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Finding the Fourth Proportional to 66,124.61, 91,260.29 and 40,977.89

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Solution

The fourth proportional to 66,124.61, 91,260.29 and 40,977.89 is: 56,554.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,124.61 : 91,260.29 = 40,977.89 : x
  2. Step 2: Convert to fraction form
    66,124.61/91,260.29 = 40,977.89/x
  3. Step 3: Cross multiply
    66,124.61x = 91,260.29 × 40,977.89
  4. Step 4: Simplify right side
    66,124.61x = 3,739,653,771.13
  5. Step 5: Solve for x
    x = 3,739,653,771.13/66,124.61
  6. Step 6: Final answer
    x = 56,554.65

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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.