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Finding the Fourth Proportional to 66,978.34, 92,381.36 and 44,336.72

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Solution

The fourth proportional to 66,978.34, 92,381.36 and 44,336.72 is: 61,152.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,978.34 : 92,381.36 = 44,336.72 : x
  2. Step 2: Convert to fraction form
    66,978.34/92,381.36 = 44,336.72/x
  3. Step 3: Cross multiply
    66,978.34x = 92,381.36 × 44,336.72
  4. Step 4: Simplify right side
    66,978.34x = 4,095,886,491.54
  5. Step 5: Solve for x
    x = 4,095,886,491.54/66,978.34
  6. Step 6: Final answer
    x = 61,152.40

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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.