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Finding the Fourth Proportional to 79,278.40, 118,933.80 and 26,693.20

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Solution

The fourth proportional to 79,278.40, 118,933.80 and 26,693.20 is: 40,045.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,278.40 : 118,933.80 = 26,693.20 : x
  2. Step 2: Convert to fraction form
    79,278.40/118,933.80 = 26,693.20/x
  3. Step 3: Cross multiply
    79,278.40x = 118,933.80 × 26,693.20
  4. Step 4: Simplify right side
    79,278.40x = 3,174,723,710.16
  5. Step 5: Solve for x
    x = 3,174,723,710.16/79,278.40
  6. Step 6: Final answer
    x = 40,045.25

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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.