Home / 78,657.12-108,538.72-48,437.60

Finding the Fourth Proportional to 78,657.12, 108,538.72 and 48,437.60

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Solution

The fourth proportional to 78,657.12, 108,538.72 and 48,437.60 is: 66,838.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,657.12 : 108,538.72 = 48,437.60 : x
  2. Step 2: Convert to fraction form
    78,657.12/108,538.72 = 48,437.60/x
  3. Step 3: Cross multiply
    78,657.12x = 108,538.72 × 48,437.60
  4. Step 4: Simplify right side
    78,657.12x = 5,257,355,103.87
  5. Step 5: Solve for x
    x = 5,257,355,103.87/78,657.12
  6. Step 6: Final answer
    x = 66,838.90

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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.