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Finding the Fourth Proportional to 66,715.88, 92,089.78 and 47,907.68

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Solution

The fourth proportional to 66,715.88, 92,089.78 and 47,907.68 is: 66,128.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,715.88 : 92,089.78 = 47,907.68 : x
  2. Step 2: Convert to fraction form
    66,715.88/92,089.78 = 47,907.68/x
  3. Step 3: Cross multiply
    66,715.88x = 92,089.78 × 47,907.68
  4. Step 4: Simplify right side
    66,715.88x = 4,411,807,131.29
  5. Step 5: Solve for x
    x = 4,411,807,131.29/66,715.88
  6. Step 6: Final answer
    x = 66,128.30

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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.