Home / 85,647.37-128,439.10-29,471.59

Finding the Fourth Proportional to 85,647.37, 128,439.10 and 29,471.59

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Solution

The fourth proportional to 85,647.37, 128,439.10 and 29,471.59 is: 44,196.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,647.37 : 128,439.10 = 29,471.59 : x
  2. Step 2: Convert to fraction form
    85,647.37/128,439.10 = 29,471.59/x
  3. Step 3: Cross multiply
    85,647.37x = 128,439.10 × 29,471.59
  4. Step 4: Simplify right side
    85,647.37x = 3,785,304,495.17
  5. Step 5: Solve for x
    x = 3,785,304,495.17/85,647.37
  6. Step 6: Final answer
    x = 44,196.39

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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.