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Finding the Fourth Proportional to 103,686.76, 143,087.94 and 58,974.76

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Solution

The fourth proportional to 103,686.76, 143,087.94 and 58,974.76 is: 81,385.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,686.76 : 143,087.94 = 58,974.76 : x
  2. Step 2: Convert to fraction form
    103,686.76/143,087.94 = 58,974.76/x
  3. Step 3: Cross multiply
    103,686.76x = 143,087.94 × 58,974.76
  4. Step 4: Simplify right side
    103,686.76x = 8,438,576,920.39
  5. Step 5: Solve for x
    x = 8,438,576,920.39/103,686.76
  6. Step 6: Final answer
    x = 81,385.29

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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.