Home / 138,669.84-208,003.68-72,075.60

Finding the Fourth Proportional to 138,669.84, 208,003.68 and 72,075.60

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Solution

The fourth proportional to 138,669.84, 208,003.68 and 72,075.60 is: 108,112.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,669.84 : 208,003.68 = 72,075.60 : x
  2. Step 2: Convert to fraction form
    138,669.84/208,003.68 = 72,075.60/x
  3. Step 3: Cross multiply
    138,669.84x = 208,003.68 × 72,075.60
  4. Step 4: Simplify right side
    138,669.84x = 14,991,990,038.21
  5. Step 5: Solve for x
    x = 14,991,990,038.21/138,669.84
  6. Step 6: Final answer
    x = 108,112.84

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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.