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Finding the Fourth Proportional to 209,928.59, 315,014.81 and 88,340.16

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Solution

The fourth proportional to 209,928.59, 315,014.81 and 88,340.16 is: 132,561.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,928.59 : 315,014.81 = 88,340.16 : x
  2. Step 2: Convert to fraction form
    209,928.59/315,014.81 = 88,340.16/x
  3. Step 3: Cross multiply
    209,928.59x = 315,014.81 × 88,340.16
  4. Step 4: Simplify right side
    209,928.59x = 27,828,458,717.77
  5. Step 5: Solve for x
    x = 27,828,458,717.77/209,928.59
  6. Step 6: Final answer
    x = 132,561.55

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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.