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Finding the Fourth Proportional to 64,431.20, 96,646.80 and 48,879.20

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Solution

The fourth proportional to 64,431.20, 96,646.80 and 48,879.20 is: 73,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,431.20 : 96,646.80 = 48,879.20 : x
  2. Step 2: Convert to fraction form
    64,431.20/96,646.80 = 48,879.20/x
  3. Step 3: Cross multiply
    64,431.20x = 96,646.80 × 48,879.20
  4. Step 4: Simplify right side
    64,431.20x = 4,724,018,266.56
  5. Step 5: Solve for x
    x = 4,724,018,266.56/64,431.20
  6. Step 6: Final answer
    x = 73,318.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.