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Finding the Fourth Proportional to 48,318, 66,678.96 and 28,188.72

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Solution

The fourth proportional to 48,318, 66,678.96 and 28,188.72 is: 38,900.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,318 : 66,678.96 = 28,188.72 : x
  2. Step 2: Convert to fraction form
    48,318/66,678.96 = 28,188.72/x
  3. Step 3: Cross multiply
    48,318x = 66,678.96 × 28,188.72
  4. Step 4: Simplify right side
    48,318x = 1,879,594,533.33
  5. Step 5: Solve for x
    x = 1,879,594,533.33/48,318
  6. Step 6: Final answer
    x = 38,900.50

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1.5x scale

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.