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Finding the Fourth Proportional to 79,281.99, 118,859.40 and 54,259.47

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Solution

The fourth proportional to 79,281.99, 118,859.40 and 54,259.47 is: 81,345.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,281.99 : 118,859.40 = 54,259.47 : x
  2. Step 2: Convert to fraction form
    79,281.99/118,859.40 = 54,259.47/x
  3. Step 3: Cross multiply
    79,281.99x = 118,859.40 × 54,259.47
  4. Step 4: Simplify right side
    79,281.99x = 6,449,248,048.52
  5. Step 5: Solve for x
    x = 6,449,248,048.52/79,281.99
  6. Step 6: Final answer
    x = 81,345.69

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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.