Home / 85,844.40-128,766.60-81,470.40

Finding the Fourth Proportional to 85,844.40, 128,766.60 and 81,470.40

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Solution

The fourth proportional to 85,844.40, 128,766.60 and 81,470.40 is: 122,205.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,844.40 : 128,766.60 = 81,470.40 : x
  2. Step 2: Convert to fraction form
    85,844.40/128,766.60 = 81,470.40/x
  3. Step 3: Cross multiply
    85,844.40x = 128,766.60 × 81,470.40
  4. Step 4: Simplify right side
    85,844.40x = 10,490,666,408.64
  5. Step 5: Solve for x
    x = 10,490,666,408.64/85,844.40
  6. Step 6: Final answer
    x = 122,205.60

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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.