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Finding the Fourth Proportional to 208,485.35, 287,710.79 and 112,992.02

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Solution

The fourth proportional to 208,485.35, 287,710.79 and 112,992.02 is: 155,929.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,485.35 : 287,710.79 = 112,992.02 : x
  2. Step 2: Convert to fraction form
    208,485.35/287,710.79 = 112,992.02/x
  3. Step 3: Cross multiply
    208,485.35x = 287,710.79 × 112,992.02
  4. Step 4: Simplify right side
    208,485.35x = 32,509,023,337.90
  5. Step 5: Solve for x
    x = 32,509,023,337.90/208,485.35
  6. Step 6: Final answer
    x = 155,929.53

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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.