Home / 70,005.31-105,013.23-20,085.01

Finding the Fourth Proportional to 70,005.31, 105,013.23 and 20,085.01

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Solution

The fourth proportional to 70,005.31, 105,013.23 and 20,085.01 is: 30,129.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,005.31 : 105,013.23 = 20,085.01 : x
  2. Step 2: Convert to fraction form
    70,005.31/105,013.23 = 20,085.01/x
  3. Step 3: Cross multiply
    70,005.31x = 105,013.23 × 20,085.01
  4. Step 4: Simplify right side
    70,005.31x = 2,109,191,774.68
  5. Step 5: Solve for x
    x = 2,109,191,774.68/70,005.31
  6. Step 6: Final answer
    x = 30,129.03

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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.