Home / 54,985.12-75,890.40-31,111.84

Finding the Fourth Proportional to 54,985.12, 75,890.40 and 31,111.84

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Solution

The fourth proportional to 54,985.12, 75,890.40 and 31,111.84 is: 42,940.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,985.12 : 75,890.40 = 31,111.84 : x
  2. Step 2: Convert to fraction form
    54,985.12/75,890.40 = 31,111.84/x
  3. Step 3: Cross multiply
    54,985.12x = 75,890.40 × 31,111.84
  4. Step 4: Simplify right side
    54,985.12x = 2,361,089,982.34
  5. Step 5: Solve for x
    x = 2,361,089,982.34/54,985.12
  6. Step 6: Final answer
    x = 42,940.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.