Home / 85,286.40-127,929.60-29,875.20

Finding the Fourth Proportional to 85,286.40, 127,929.60 and 29,875.20

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Solution

The fourth proportional to 85,286.40, 127,929.60 and 29,875.20 is: 44,812.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,286.40 : 127,929.60 = 29,875.20 : x
  2. Step 2: Convert to fraction form
    85,286.40/127,929.60 = 29,875.20/x
  3. Step 3: Cross multiply
    85,286.40x = 127,929.60 × 29,875.20
  4. Step 4: Simplify right side
    85,286.40x = 3,821,922,385.92
  5. Step 5: Solve for x
    x = 3,821,922,385.92/85,286.40
  6. Step 6: Final answer
    x = 44,812.80

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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.