Home / 85,459.36-128,179.32-23,134.72

Finding the Fourth Proportional to 85,459.36, 128,179.32 and 23,134.72

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Solution

The fourth proportional to 85,459.36, 128,179.32 and 23,134.72 is: 34,699.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,459.36 : 128,179.32 = 23,134.72 : x
  2. Step 2: Convert to fraction form
    85,459.36/128,179.32 = 23,134.72/x
  3. Step 3: Cross multiply
    85,459.36x = 128,179.32 × 23,134.72
  4. Step 4: Simplify right side
    85,459.36x = 2,965,392,677.99
  5. Step 5: Solve for x
    x = 2,965,392,677.99/85,459.36
  6. Step 6: Final answer
    x = 34,699.45

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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.