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Finding the Fourth Proportional to 105,889.60, 158,900.20 and 65,986.90

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Solution

The fourth proportional to 105,889.60, 158,900.20 and 65,986.90 is: 99,021.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,889.60 : 158,900.20 = 65,986.90 : x
  2. Step 2: Convert to fraction form
    105,889.60/158,900.20 = 65,986.90/x
  3. Step 3: Cross multiply
    105,889.60x = 158,900.20 × 65,986.90
  4. Step 4: Simplify right side
    105,889.60x = 10,485,331,607.38
  5. Step 5: Solve for x
    x = 10,485,331,607.38/105,889.60
  6. Step 6: Final answer
    x = 99,021.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.