Home / 85,422.60-128,135.93-26,258.78

Finding the Fourth Proportional to 85,422.60, 128,135.93 and 26,258.78

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Solution

The fourth proportional to 85,422.60, 128,135.93 and 26,258.78 is: 39,388.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,422.60 : 128,135.93 = 26,258.78 : x
  2. Step 2: Convert to fraction form
    85,422.60/128,135.93 = 26,258.78/x
  3. Step 3: Cross multiply
    85,422.60x = 128,135.93 × 26,258.78
  4. Step 4: Simplify right side
    85,422.60x = 3,364,693,385.01
  5. Step 5: Solve for x
    x = 3,364,693,385.01/85,422.60
  6. Step 6: Final answer
    x = 39,388.80

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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.