Home / 85,581.04-128,430.36-30,177.04

Finding the Fourth Proportional to 85,581.04, 128,430.36 and 30,177.04

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Solution

The fourth proportional to 85,581.04, 128,430.36 and 30,177.04 is: 45,286.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,581.04 : 128,430.36 = 30,177.04 : x
  2. Step 2: Convert to fraction form
    85,581.04/128,430.36 = 30,177.04/x
  3. Step 3: Cross multiply
    85,581.04x = 128,430.36 × 30,177.04
  4. Step 4: Simplify right side
    85,581.04x = 3,875,648,110.93
  5. Step 5: Solve for x
    x = 3,875,648,110.93/85,581.04
  6. Step 6: Final answer
    x = 45,286.29

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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.