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Finding the Fourth Proportional to 77,009.40, 115,427.70 and 43,745.40

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Solution

The fourth proportional to 77,009.40, 115,427.70 and 43,745.40 is: 65,569.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,009.40 : 115,427.70 = 43,745.40 : x
  2. Step 2: Convert to fraction form
    77,009.40/115,427.70 = 43,745.40/x
  3. Step 3: Cross multiply
    77,009.40x = 115,427.70 × 43,745.40
  4. Step 4: Simplify right side
    77,009.40x = 5,049,430,907.58
  5. Step 5: Solve for x
    x = 5,049,430,907.58/77,009.40
  6. Step 6: Final answer
    x = 65,569.02

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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.