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Finding the Fourth Proportional to 208,215.88, 287,340.20 and 112,724.60

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Solution

The fourth proportional to 208,215.88, 287,340.20 and 112,724.60 is: 155,561.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,215.88 : 287,340.20 = 112,724.60 : x
  2. Step 2: Convert to fraction form
    208,215.88/287,340.20 = 112,724.60/x
  3. Step 3: Cross multiply
    208,215.88x = 287,340.20 × 112,724.60
  4. Step 4: Simplify right side
    208,215.88x = 32,390,309,108.92
  5. Step 5: Solve for x
    x = 32,390,309,108.92/208,215.88
  6. Step 6: Final answer
    x = 155,561.19

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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.