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Finding the Fourth Proportional to 86,643.80, 130,023.30 and 49,203.80

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Solution

The fourth proportional to 86,643.80, 130,023.30 and 49,203.80 is: 73,838.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,643.80 : 130,023.30 = 49,203.80 : x
  2. Step 2: Convert to fraction form
    86,643.80/130,023.30 = 49,203.80/x
  3. Step 3: Cross multiply
    86,643.80x = 130,023.30 × 49,203.80
  4. Step 4: Simplify right side
    86,643.80x = 6,397,640,448.54
  5. Step 5: Solve for x
    x = 6,397,640,448.54/86,643.80
  6. Step 6: Final answer
    x = 73,838.41

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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.