Home / 71,990.12-107,985.78-47,187.25

Finding the Fourth Proportional to 71,990.12, 107,985.78 and 47,187.25

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Solution

The fourth proportional to 71,990.12, 107,985.78 and 47,187.25 is: 70,781.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,990.12 : 107,985.78 = 47,187.25 : x
  2. Step 2: Convert to fraction form
    71,990.12/107,985.78 = 47,187.25/x
  3. Step 3: Cross multiply
    71,990.12x = 107,985.78 × 47,187.25
  4. Step 4: Simplify right side
    71,990.12x = 5,095,551,727.34
  5. Step 5: Solve for x
    x = 5,095,551,727.34/71,990.12
  6. Step 6: Final answer
    x = 70,781.26

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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.