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Finding the Fourth Proportional to 71,907.08, 107,860.61 and 21,987.16

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Solution

The fourth proportional to 71,907.08, 107,860.61 and 21,987.16 is: 32,980.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,907.08 : 107,860.61 = 21,987.16 : x
  2. Step 2: Convert to fraction form
    71,907.08/107,860.61 = 21,987.16/x
  3. Step 3: Cross multiply
    71,907.08x = 107,860.61 × 21,987.16
  4. Step 4: Simplify right side
    71,907.08x = 2,371,548,275.08
  5. Step 5: Solve for x
    x = 2,371,548,275.08/71,907.08
  6. Step 6: Final answer
    x = 32,980.74

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1.5x scale

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.