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Finding the Fourth Proportional to 119,915, 165,485.34 and 66,199.88

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Solution

The fourth proportional to 119,915, 165,485.34 and 66,199.88 is: 91,357.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,915 : 165,485.34 = 66,199.88 : x
  2. Step 2: Convert to fraction form
    119,915/165,485.34 = 66,199.88/x
  3. Step 3: Cross multiply
    119,915x = 165,485.34 × 66,199.88
  4. Step 4: Simplify right side
    119,915x = 10,955,109,649.76
  5. Step 5: Solve for x
    x = 10,955,109,649.76/119,915
  6. Step 6: Final answer
    x = 91,357.29

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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.