Home / 285,303.12-428,025.75-85,627.17

Finding the Fourth Proportional to 285,303.12, 428,025.75 and 85,627.17

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Solution

The fourth proportional to 285,303.12, 428,025.75 and 85,627.17 is: 128,462.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,303.12 : 428,025.75 = 85,627.17 : x
  2. Step 2: Convert to fraction form
    285,303.12/428,025.75 = 85,627.17/x
  3. Step 3: Cross multiply
    285,303.12x = 428,025.75 × 85,627.17
  4. Step 4: Simplify right side
    285,303.12x = 36,650,633,659.63
  5. Step 5: Solve for x
    x = 36,650,633,659.63/285,303.12
  6. Step 6: Final answer
    x = 128,462.09

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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.