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Finding the Fourth Proportional to 102,990.76, 142,126.58 and 57,668.60

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Solution

The fourth proportional to 102,990.76, 142,126.58 and 57,668.60 is: 79,582.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,990.76 : 142,126.58 = 57,668.60 : x
  2. Step 2: Convert to fraction form
    102,990.76/142,126.58 = 57,668.60/x
  3. Step 3: Cross multiply
    102,990.76x = 142,126.58 × 57,668.60
  4. Step 4: Simplify right side
    102,990.76x = 8,196,240,891.39
  5. Step 5: Solve for x
    x = 8,196,240,891.39/102,990.76
  6. Step 6: Final answer
    x = 79,582.29

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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.