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Finding the Fourth Proportional to 64,751.20, 97,331.60 and 61,064.80

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Solution

The fourth proportional to 64,751.20, 97,331.60 and 61,064.80 is: 91,790.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,751.20 : 97,331.60 = 61,064.80 : x
  2. Step 2: Convert to fraction form
    64,751.20/97,331.60 = 61,064.80/x
  3. Step 3: Cross multiply
    64,751.20x = 97,331.60 × 61,064.80
  4. Step 4: Simplify right side
    64,751.20x = 5,943,534,687.68
  5. Step 5: Solve for x
    x = 5,943,534,687.68/64,751.20
  6. Step 6: Final answer
    x = 91,790.34

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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.