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Finding the Fourth Proportional to 236,775.78, 355,038.93 and 161,917.20

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Solution

The fourth proportional to 236,775.78, 355,038.93 and 161,917.20 is: 242,790.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,775.78 : 355,038.93 = 161,917.20 : x
  2. Step 2: Convert to fraction form
    236,775.78/355,038.93 = 161,917.20/x
  3. Step 3: Cross multiply
    236,775.78x = 355,038.93 × 161,917.20
  4. Step 4: Simplify right side
    236,775.78x = 57,486,909,436.60
  5. Step 5: Solve for x
    x = 57,486,909,436.60/236,775.78
  6. Step 6: Final answer
    x = 242,790.50

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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.