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Finding the Fourth Proportional to 104,911.12, 144,778 and 57,164.32

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Solution

The fourth proportional to 104,911.12, 144,778 and 57,164.32 is: 78,887.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,911.12 : 144,778 = 57,164.32 : x
  2. Step 2: Convert to fraction form
    104,911.12/144,778 = 57,164.32/x
  3. Step 3: Cross multiply
    104,911.12x = 144,778 × 57,164.32
  4. Step 4: Simplify right side
    104,911.12x = 8,276,135,920.96
  5. Step 5: Solve for x
    x = 8,276,135,920.96/104,911.12
  6. Step 6: Final answer
    x = 78,887.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.