Home / 48,111.40-72,128.70-20,386.60

Finding the Fourth Proportional to 48,111.40, 72,128.70 and 20,386.60

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Solution

The fourth proportional to 48,111.40, 72,128.70 and 20,386.60 is: 30,563.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,111.40 : 72,128.70 = 20,386.60 : x
  2. Step 2: Convert to fraction form
    48,111.40/72,128.70 = 20,386.60/x
  3. Step 3: Cross multiply
    48,111.40x = 72,128.70 × 20,386.60
  4. Step 4: Simplify right side
    48,111.40x = 1,470,458,955.42
  5. Step 5: Solve for x
    x = 1,470,458,955.42/48,111.40
  6. Step 6: Final answer
    x = 30,563.63

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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.