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Finding the Fourth Proportional to 86,907.70, 130,363.98 and 30,739.87

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Solution

The fourth proportional to 86,907.70, 130,363.98 and 30,739.87 is: 46,110.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,907.70 : 130,363.98 = 30,739.87 : x
  2. Step 2: Convert to fraction form
    86,907.70/130,363.98 = 30,739.87/x
  3. Step 3: Cross multiply
    86,907.70x = 130,363.98 × 30,739.87
  4. Step 4: Simplify right side
    86,907.70x = 4,007,371,797.88
  5. Step 5: Solve for x
    x = 4,007,371,797.88/86,907.70
  6. Step 6: Final answer
    x = 46,110.66

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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.