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Finding the Fourth Proportional to 85,434.74, 128,155.60 and 29,313.44

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Solution

The fourth proportional to 85,434.74, 128,155.60 and 29,313.44 is: 43,971.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,434.74 : 128,155.60 = 29,313.44 : x
  2. Step 2: Convert to fraction form
    85,434.74/128,155.60 = 29,313.44/x
  3. Step 3: Cross multiply
    85,434.74x = 128,155.60 × 29,313.44
  4. Step 4: Simplify right side
    85,434.74x = 3,756,681,491.26
  5. Step 5: Solve for x
    x = 3,756,681,491.26/85,434.74
  6. Step 6: Final answer
    x = 43,971.36

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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.