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Finding the Fourth Proportional to 67,978.91, 101,968.40 and 28,525.43

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Solution

The fourth proportional to 67,978.91, 101,968.40 and 28,525.43 is: 42,788.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,978.91 : 101,968.40 = 28,525.43 : x
  2. Step 2: Convert to fraction form
    67,978.91/101,968.40 = 28,525.43/x
  3. Step 3: Cross multiply
    67,978.91x = 101,968.40 × 28,525.43
  4. Step 4: Simplify right side
    67,978.91x = 2,908,692,782.65
  5. Step 5: Solve for x
    x = 2,908,692,782.65/67,978.91
  6. Step 6: Final answer
    x = 42,788.16

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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.