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Finding the Fourth Proportional to 208,689.57, 287,991.60 and 118,043.58

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Solution

The fourth proportional to 208,689.57, 287,991.60 and 118,043.58 is: 162,900.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,689.57 : 287,991.60 = 118,043.58 : x
  2. Step 2: Convert to fraction form
    208,689.57/287,991.60 = 118,043.58/x
  3. Step 3: Cross multiply
    208,689.57x = 287,991.60 × 118,043.58
  4. Step 4: Simplify right side
    208,689.57x = 33,995,559,473.93
  5. Step 5: Solve for x
    x = 33,995,559,473.93/208,689.57
  6. Step 6: Final answer
    x = 162,900.14

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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.