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Finding the Fourth Proportional to 236,821.80, 355,113.66 and 78,995.88

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Solution

The fourth proportional to 236,821.80, 355,113.66 and 78,995.88 is: 118,454.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,821.80 : 355,113.66 = 78,995.88 : x
  2. Step 2: Convert to fraction form
    236,821.80/355,113.66 = 78,995.88/x
  3. Step 3: Cross multiply
    236,821.80x = 355,113.66 × 78,995.88
  4. Step 4: Simplify right side
    236,821.80x = 28,052,516,071.72
  5. Step 5: Solve for x
    x = 28,052,516,071.72/236,821.80
  6. Step 6: Final answer
    x = 118,454.11

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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.