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Finding the Fourth Proportional to 236,840.50, 355,400.80 and 87,185.88

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Solution

The fourth proportional to 236,840.50, 355,400.80 and 87,185.88 is: 130,830.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,840.50 : 355,400.80 = 87,185.88 : x
  2. Step 2: Convert to fraction form
    236,840.50/355,400.80 = 87,185.88/x
  3. Step 3: Cross multiply
    236,840.50x = 355,400.80 × 87,185.88
  4. Step 4: Simplify right side
    236,840.50x = 30,985,931,500.70
  5. Step 5: Solve for x
    x = 30,985,931,500.70/236,840.50
  6. Step 6: Final answer
    x = 130,830.38

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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.