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Finding the Fourth Proportional to 78,485.50, 108,319.80 and 44,951.50

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Solution

The fourth proportional to 78,485.50, 108,319.80 and 44,951.50 is: 62,038.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,485.50 : 108,319.80 = 44,951.50 : x
  2. Step 2: Convert to fraction form
    78,485.50/108,319.80 = 44,951.50/x
  3. Step 3: Cross multiply
    78,485.50x = 108,319.80 × 44,951.50
  4. Step 4: Simplify right side
    78,485.50x = 4,869,137,489.70
  5. Step 5: Solve for x
    x = 4,869,137,489.70/78,485.50
  6. Step 6: Final answer
    x = 62,038.69

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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.