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Finding the Fourth Proportional to 103,689.88, 143,090.40 and 58,367.74

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Solution

The fourth proportional to 103,689.88, 143,090.40 and 58,367.74 is: 80,546.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,689.88 : 143,090.40 = 58,367.74 : x
  2. Step 2: Convert to fraction form
    103,689.88/143,090.40 = 58,367.74/x
  3. Step 3: Cross multiply
    103,689.88x = 143,090.40 × 58,367.74
  4. Step 4: Simplify right side
    103,689.88x = 8,351,863,263.70
  5. Step 5: Solve for x
    x = 8,351,863,263.70/103,689.88
  6. Step 6: Final answer
    x = 80,546.56

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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.