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Finding the Fourth Proportional to 85,844.90, 128,785.81 and 28,924.46

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Solution

The fourth proportional to 85,844.90, 128,785.81 and 28,924.46 is: 43,392.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,844.90 : 128,785.81 = 28,924.46 : x
  2. Step 2: Convert to fraction form
    85,844.90/128,785.81 = 28,924.46/x
  3. Step 3: Cross multiply
    85,844.90x = 128,785.81 × 28,924.46
  4. Step 4: Simplify right side
    85,844.90x = 3,725,060,259.57
  5. Step 5: Solve for x
    x = 3,725,060,259.57/85,844.90
  6. Step 6: Final answer
    x = 43,392.91

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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.