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Finding the Fourth Proportional to 106,990.98, 147,647.28 and 61,668.60

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Solution

The fourth proportional to 106,990.98, 147,647.28 and 61,668.60 is: 85,102.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,990.98 : 147,647.28 = 61,668.60 : x
  2. Step 2: Convert to fraction form
    106,990.98/147,647.28 = 61,668.60/x
  3. Step 3: Cross multiply
    106,990.98x = 147,647.28 × 61,668.60
  4. Step 4: Simplify right side
    106,990.98x = 9,105,201,051.41
  5. Step 5: Solve for x
    x = 9,105,201,051.41/106,990.98
  6. Step 6: Final answer
    x = 85,102.51

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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.