Home / 85,905.82-128,827.83-29,730.68

Finding the Fourth Proportional to 85,905.82, 128,827.83 and 29,730.68

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Solution

The fourth proportional to 85,905.82, 128,827.83 and 29,730.68 is: 44,585.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,905.82 : 128,827.83 = 29,730.68 : x
  2. Step 2: Convert to fraction form
    85,905.82/128,827.83 = 29,730.68/x
  3. Step 3: Cross multiply
    85,905.82x = 128,827.83 × 29,730.68
  4. Step 4: Simplify right side
    85,905.82x = 3,830,138,344.69
  5. Step 5: Solve for x
    x = 3,830,138,344.69/85,905.82
  6. Step 6: Final answer
    x = 44,585.32

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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.