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Finding the Fourth Proportional to 208,560.51, 287,660.63 and 136,914.39

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Solution

The fourth proportional to 208,560.51, 287,660.63 and 136,914.39 is: 188,841.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,560.51 : 287,660.63 = 136,914.39 : x
  2. Step 2: Convert to fraction form
    208,560.51/287,660.63 = 136,914.39/x
  3. Step 3: Cross multiply
    208,560.51x = 287,660.63 × 136,914.39
  4. Step 4: Simplify right side
    208,560.51x = 39,384,880,025.75
  5. Step 5: Solve for x
    x = 39,384,880,025.75/208,560.51
  6. Step 6: Final answer
    x = 188,841.50

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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.