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Finding the Fourth Proportional to 66,666.26, 92,000.87 and 39,803.72

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Solution

The fourth proportional to 66,666.26, 92,000.87 and 39,803.72 is: 54,929.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,666.26 : 92,000.87 = 39,803.72 : x
  2. Step 2: Convert to fraction form
    66,666.26/92,000.87 = 39,803.72/x
  3. Step 3: Cross multiply
    66,666.26x = 92,000.87 × 39,803.72
  4. Step 4: Simplify right side
    66,666.26x = 3,661,976,210.21
  5. Step 5: Solve for x
    x = 3,661,976,210.21/66,666.26
  6. Step 6: Final answer
    x = 54,929.98

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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.