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Finding the Fourth Proportional to 207,999.90, 287,039.10 and 112,506.60

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Solution

The fourth proportional to 207,999.90, 287,039.10 and 112,506.60 is: 155,258.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,999.90 : 287,039.10 = 112,506.60 : x
  2. Step 2: Convert to fraction form
    207,999.90/287,039.10 = 112,506.60/x
  3. Step 3: Cross multiply
    207,999.90x = 287,039.10 × 112,506.60
  4. Step 4: Simplify right side
    207,999.90x = 32,293,793,208.06
  5. Step 5: Solve for x
    x = 32,293,793,208.06/207,999.90
  6. Step 6: Final answer
    x = 155,258.70

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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.