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Finding the Fourth Proportional to 259,485.12, 389,292.48 and 72,495

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Solution

The fourth proportional to 259,485.12, 389,292.48 and 72,495 is: 108,760.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,485.12 : 389,292.48 = 72,495 : x
  2. Step 2: Convert to fraction form
    259,485.12/389,292.48 = 72,495/x
  3. Step 3: Cross multiply
    259,485.12x = 389,292.48 × 72,495
  4. Step 4: Simplify right side
    259,485.12x = 28,221,758,337.60
  5. Step 5: Solve for x
    x = 28,221,758,337.60/259,485.12
  6. Step 6: Final answer
    x = 108,760.60

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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.