Home / 100,782.08-139,075.79-55,455.82

Finding the Fourth Proportional to 100,782.08, 139,075.79 and 55,455.82

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Solution

The fourth proportional to 100,782.08, 139,075.79 and 55,455.82 is: 76,527.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,782.08 : 139,075.79 = 55,455.82 : x
  2. Step 2: Convert to fraction form
    100,782.08/139,075.79 = 55,455.82/x
  3. Step 3: Cross multiply
    100,782.08x = 139,075.79 × 55,455.82
  4. Step 4: Simplify right side
    100,782.08x = 7,712,562,133.93
  5. Step 5: Solve for x
    x = 7,712,562,133.93/100,782.08
  6. Step 6: Final answer
    x = 76,527.12

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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.