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Finding the Fourth Proportional to 70,163.48, 105,261.65 and 47,987.30

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Solution

The fourth proportional to 70,163.48, 105,261.65 and 47,987.30 is: 71,992.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,163.48 : 105,261.65 = 47,987.30 : x
  2. Step 2: Convert to fraction form
    70,163.48/105,261.65 = 47,987.30/x
  3. Step 3: Cross multiply
    70,163.48x = 105,261.65 × 47,987.30
  4. Step 4: Simplify right side
    70,163.48x = 5,051,221,610.80
  5. Step 5: Solve for x
    x = 5,051,221,610.80/70,163.48
  6. Step 6: Final answer
    x = 71,992.18

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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.