Home / 101,288.45-139,778.09-56,576.45

Finding the Fourth Proportional to 101,288.45, 139,778.09 and 56,576.45

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Solution

The fourth proportional to 101,288.45, 139,778.09 and 56,576.45 is: 78,075.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,288.45 : 139,778.09 = 56,576.45 : x
  2. Step 2: Convert to fraction form
    101,288.45/139,778.09 = 56,576.45/x
  3. Step 3: Cross multiply
    101,288.45x = 139,778.09 × 56,576.45
  4. Step 4: Simplify right side
    101,288.45x = 7,908,147,138.21
  5. Step 5: Solve for x
    x = 7,908,147,138.21/101,288.45
  6. Step 6: Final answer
    x = 78,075.51

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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.