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Finding the Fourth Proportional to 104,179.60, 143,738.67 and 65,421.60

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Solution

The fourth proportional to 104,179.60, 143,738.67 and 65,421.60 is: 90,263.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,179.60 : 143,738.67 = 65,421.60 : x
  2. Step 2: Convert to fraction form
    104,179.60/143,738.67 = 65,421.60/x
  3. Step 3: Cross multiply
    104,179.60x = 143,738.67 × 65,421.60
  4. Step 4: Simplify right side
    104,179.60x = 9,403,613,577.48
  5. Step 5: Solve for x
    x = 9,403,613,577.48/104,179.60
  6. Step 6: Final answer
    x = 90,263.49

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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.