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Finding the Fourth Proportional to 208,426.72, 287,628.48 and 112,936

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Solution

The fourth proportional to 208,426.72, 287,628.48 and 112,936 is: 155,851.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,426.72 : 287,628.48 = 112,936 : x
  2. Step 2: Convert to fraction form
    208,426.72/287,628.48 = 112,936/x
  3. Step 3: Cross multiply
    208,426.72x = 287,628.48 × 112,936
  4. Step 4: Simplify right side
    208,426.72x = 32,483,610,017.28
  5. Step 5: Solve for x
    x = 32,483,610,017.28/208,426.72
  6. Step 6: Final answer
    x = 155,851.47

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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.