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Finding the Fourth Proportional to 208,485.52, 287,708.88 and 112,991.20

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Solution

The fourth proportional to 208,485.52, 287,708.88 and 112,991.20 is: 155,927.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,485.52 : 287,708.88 = 112,991.20 : x
  2. Step 2: Convert to fraction form
    208,485.52/287,708.88 = 112,991.20/x
  3. Step 3: Cross multiply
    208,485.52x = 287,708.88 × 112,991.20
  4. Step 4: Simplify right side
    208,485.52x = 32,508,571,601.86
  5. Step 5: Solve for x
    x = 32,508,571,601.86/208,485.52
  6. Step 6: Final answer
    x = 155,927.24

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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.