Home / 90,129.47-135,075.89-66,325.56

Finding the Fourth Proportional to 90,129.47, 135,075.89 and 66,325.56

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Solution

The fourth proportional to 90,129.47, 135,075.89 and 66,325.56 is: 99,401.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,129.47 : 135,075.89 = 66,325.56 : x
  2. Step 2: Convert to fraction form
    90,129.47/135,075.89 = 66,325.56/x
  3. Step 3: Cross multiply
    90,129.47x = 135,075.89 × 66,325.56
  4. Step 4: Simplify right side
    90,129.47x = 8,958,983,715.12
  5. Step 5: Solve for x
    x = 8,958,983,715.12/90,129.47
  6. Step 6: Final answer
    x = 99,401.27

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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.