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Finding the Fourth Proportional to 236,803.80, 355,090.56 and 78,978.96

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Solution

The fourth proportional to 236,803.80, 355,090.56 and 78,978.96 is: 118,430.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,803.80 : 355,090.56 = 78,978.96 : x
  2. Step 2: Convert to fraction form
    236,803.80/355,090.56 = 78,978.96/x
  3. Step 3: Cross multiply
    236,803.80x = 355,090.56 × 78,978.96
  4. Step 4: Simplify right side
    236,803.80x = 28,044,683,134.62
  5. Step 5: Solve for x
    x = 28,044,683,134.62/236,803.80
  6. Step 6: Final answer
    x = 118,430.04

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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.