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Finding the Fourth Proportional to 66,978.58, 92,435.10 and 44,278.12

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Solution

The fourth proportional to 66,978.58, 92,435.10 and 44,278.12 is: 61,106.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,978.58 : 92,435.10 = 44,278.12 : x
  2. Step 2: Convert to fraction form
    66,978.58/92,435.10 = 44,278.12/x
  3. Step 3: Cross multiply
    66,978.58x = 92,435.10 × 44,278.12
  4. Step 4: Simplify right side
    66,978.58x = 4,092,852,450.01
  5. Step 5: Solve for x
    x = 4,092,852,450.01/66,978.58
  6. Step 6: Final answer
    x = 61,106.89

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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.