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Finding the Fourth Proportional to 77,008.66, 115,512.91 and 28,986.23

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Solution

The fourth proportional to 77,008.66, 115,512.91 and 28,986.23 is: 43,479.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,008.66 : 115,512.91 = 28,986.23 : x
  2. Step 2: Convert to fraction form
    77,008.66/115,512.91 = 28,986.23/x
  3. Step 3: Cross multiply
    77,008.66x = 115,512.91 × 28,986.23
  4. Step 4: Simplify right side
    77,008.66x = 3,348,283,993.55
  5. Step 5: Solve for x
    x = 3,348,283,993.55/77,008.66
  6. Step 6: Final answer
    x = 43,479.32

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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.