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Finding the Fourth Proportional to 70,978.20, 97,900.80 and 57,550.02

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Solution

The fourth proportional to 70,978.20, 97,900.80 and 57,550.02 is: 79,379.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,978.20 : 97,900.80 = 57,550.02 : x
  2. Step 2: Convert to fraction form
    70,978.20/97,900.80 = 57,550.02/x
  3. Step 3: Cross multiply
    70,978.20x = 97,900.80 × 57,550.02
  4. Step 4: Simplify right side
    70,978.20x = 5,634,192,998.02
  5. Step 5: Solve for x
    x = 5,634,192,998.02/70,978.20
  6. Step 6: Final answer
    x = 79,379.20

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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.