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Finding the Fourth Proportional to 208,422.01, 287,622.48 and 112,928.78

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Solution

The fourth proportional to 208,422.01, 287,622.48 and 112,928.78 is: 155,841.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,422.01 : 287,622.48 = 112,928.78 : x
  2. Step 2: Convert to fraction form
    208,422.01/287,622.48 = 112,928.78/x
  3. Step 3: Cross multiply
    208,422.01x = 287,622.48 × 112,928.78
  4. Step 4: Simplify right side
    208,422.01x = 32,480,853,764.22
  5. Step 5: Solve for x
    x = 32,480,853,764.22/208,422.01
  6. Step 6: Final answer
    x = 155,841.77

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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.