Home / 85,574.28-128,361.78-56,178.12

Finding the Fourth Proportional to 85,574.28, 128,361.78 and 56,178.12

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Solution

The fourth proportional to 85,574.28, 128,361.78 and 56,178.12 is: 84,267.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,574.28 : 128,361.78 = 56,178.12 : x
  2. Step 2: Convert to fraction form
    85,574.28/128,361.78 = 56,178.12/x
  3. Step 3: Cross multiply
    85,574.28x = 128,361.78 × 56,178.12
  4. Step 4: Simplify right side
    85,574.28x = 7,211,123,480.25
  5. Step 5: Solve for x
    x = 7,211,123,480.25/85,574.28
  6. Step 6: Final answer
    x = 84,267.42

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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.