Home / 85,471.20-128,207.66-56,075.49

Finding the Fourth Proportional to 85,471.20, 128,207.66 and 56,075.49

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Solution

The fourth proportional to 85,471.20, 128,207.66 and 56,075.49 is: 84,113.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,471.20 : 128,207.66 = 56,075.49 : x
  2. Step 2: Convert to fraction form
    85,471.20/128,207.66 = 56,075.49/x
  3. Step 3: Cross multiply
    85,471.20x = 128,207.66 × 56,075.49
  4. Step 4: Simplify right side
    85,471.20x = 7,189,307,075.88
  5. Step 5: Solve for x
    x = 7,189,307,075.88/85,471.20
  6. Step 6: Final answer
    x = 84,113.80

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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.