Home / 70,128.47-105,189.12-25,751.81

Finding the Fourth Proportional to 70,128.47, 105,189.12 and 25,751.81

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Solution

The fourth proportional to 70,128.47, 105,189.12 and 25,751.81 is: 38,626.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,128.47 : 105,189.12 = 25,751.81 : x
  2. Step 2: Convert to fraction form
    70,128.47/105,189.12 = 25,751.81/x
  3. Step 3: Cross multiply
    70,128.47x = 105,189.12 × 25,751.81
  4. Step 4: Simplify right side
    70,128.47x = 2,708,809,706.36
  5. Step 5: Solve for x
    x = 2,708,809,706.36/70,128.47
  6. Step 6: Final answer
    x = 38,626.39

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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.