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Finding the Fourth Proportional to 208,214.55, 287,335.72 and 112,721.22

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Solution

The fourth proportional to 208,214.55, 287,335.72 and 112,721.22 is: 155,555.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,214.55 : 287,335.72 = 112,721.22 : x
  2. Step 2: Convert to fraction form
    208,214.55/287,335.72 = 112,721.22/x
  3. Step 3: Cross multiply
    208,214.55x = 287,335.72 × 112,721.22
  4. Step 4: Simplify right side
    208,214.55x = 32,388,833,048.88
  5. Step 5: Solve for x
    x = 32,388,833,048.88/208,214.55
  6. Step 6: Final answer
    x = 155,555.09

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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.