Home / 228,570.12-315,429.14-137,908.57

Finding the Fourth Proportional to 228,570.12, 315,429.14 and 137,908.57

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Solution

The fourth proportional to 228,570.12, 315,429.14 and 137,908.57 is: 190,315.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,570.12 : 315,429.14 = 137,908.57 : x
  2. Step 2: Convert to fraction form
    228,570.12/315,429.14 = 137,908.57/x
  3. Step 3: Cross multiply
    228,570.12x = 315,429.14 × 137,908.57
  4. Step 4: Simplify right side
    228,570.12x = 43,500,381,338.47
  5. Step 5: Solve for x
    x = 43,500,381,338.47/228,570.12
  6. Step 6: Final answer
    x = 190,315.25

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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.