Home / 85,594.20-128,421.72-38,205

Finding the Fourth Proportional to 85,594.20, 128,421.72 and 38,205

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Solution

The fourth proportional to 85,594.20, 128,421.72 and 38,205 is: 57,321.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,594.20 : 128,421.72 = 38,205 : x
  2. Step 2: Convert to fraction form
    85,594.20/128,421.72 = 38,205/x
  3. Step 3: Cross multiply
    85,594.20x = 128,421.72 × 38,205
  4. Step 4: Simplify right side
    85,594.20x = 4,906,351,812.60
  5. Step 5: Solve for x
    x = 4,906,351,812.60/85,594.20
  6. Step 6: Final answer
    x = 57,321.08

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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.