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Finding the Fourth Proportional to 79,259.20, 118,888.64 and 19,287.20

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Solution

The fourth proportional to 79,259.20, 118,888.64 and 19,287.20 is: 28,930.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,259.20 : 118,888.64 = 19,287.20 : x
  2. Step 2: Convert to fraction form
    79,259.20/118,888.64 = 19,287.20/x
  3. Step 3: Cross multiply
    79,259.20x = 118,888.64 × 19,287.20
  4. Step 4: Simplify right side
    79,259.20x = 2,293,028,977.41
  5. Step 5: Solve for x
    x = 2,293,028,977.41/79,259.20
  6. Step 6: Final answer
    x = 28,930.76

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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.