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Finding the Fourth Proportional to 80,630.90, 112,999.90 and 80,630.90

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Solution

The fourth proportional to 80,630.90, 112,999.90 and 80,630.90 is: 112,999.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,630.90 : 112,999.90 = 80,630.90 : x
  2. Step 2: Convert to fraction form
    80,630.90/112,999.90 = 80,630.90/x
  3. Step 3: Cross multiply
    80,630.90x = 112,999.90 × 80,630.90
  4. Step 4: Simplify right side
    80,630.90x = 9,111,283,636.91
  5. Step 5: Solve for x
    x = 9,111,283,636.91/80,630.90
  6. Step 6: Final answer
    x = 112,999.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.