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Finding the Fourth Proportional to 208,211.88, 287,334.68 and 112,720.60

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Solution

The fourth proportional to 208,211.88, 287,334.68 and 112,720.60 is: 155,555.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,211.88 : 287,334.68 = 112,720.60 : x
  2. Step 2: Convert to fraction form
    208,211.88/287,334.68 = 112,720.60/x
  3. Step 3: Cross multiply
    208,211.88x = 287,334.68 × 112,720.60
  4. Step 4: Simplify right side
    208,211.88x = 32,388,537,530.41
  5. Step 5: Solve for x
    x = 32,388,537,530.41/208,211.88
  6. Step 6: Final answer
    x = 155,555.67

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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.