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Finding the Fourth Proportional to 64,314.40, 96,471.60 and 43,319.20

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Solution

The fourth proportional to 64,314.40, 96,471.60 and 43,319.20 is: 64,978.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,314.40 : 96,471.60 = 43,319.20 : x
  2. Step 2: Convert to fraction form
    64,314.40/96,471.60 = 43,319.20/x
  3. Step 3: Cross multiply
    64,314.40x = 96,471.60 × 43,319.20
  4. Step 4: Simplify right side
    64,314.40x = 4,179,072,534.72
  5. Step 5: Solve for x
    x = 4,179,072,534.72/64,314.40
  6. Step 6: Final answer
    x = 64,978.80

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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.