Home / 85,694.04-128,558.42-30,328.92

Finding the Fourth Proportional to 85,694.04, 128,558.42 and 30,328.92

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Solution

The fourth proportional to 85,694.04, 128,558.42 and 30,328.92 is: 45,499.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,694.04 : 128,558.42 = 30,328.92 : x
  2. Step 2: Convert to fraction form
    85,694.04/128,558.42 = 30,328.92/x
  3. Step 3: Cross multiply
    85,694.04x = 128,558.42 × 30,328.92
  4. Step 4: Simplify right side
    85,694.04x = 3,899,038,035.51
  5. Step 5: Solve for x
    x = 3,899,038,035.51/85,694.04
  6. Step 6: Final answer
    x = 45,499.52

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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.