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Finding the Fourth Proportional to 208,321.45, 287,485.13 and 112,828.93

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Solution

The fourth proportional to 208,321.45, 287,485.13 and 112,828.93 is: 155,704.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,321.45 : 287,485.13 = 112,828.93 : x
  2. Step 2: Convert to fraction form
    208,321.45/287,485.13 = 112,828.93/x
  3. Step 3: Cross multiply
    208,321.45x = 287,485.13 × 112,828.93
  4. Step 4: Simplify right side
    208,321.45x = 32,436,639,608.81
  5. Step 5: Solve for x
    x = 32,436,639,608.81/208,321.45
  6. Step 6: Final answer
    x = 155,704.75

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1.5x scale

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.