Home / 128,881.08-193,376.70-69,758.64

Finding the Fourth Proportional to 128,881.08, 193,376.70 and 69,758.64

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Solution

The fourth proportional to 128,881.08, 193,376.70 and 69,758.64 is: 104,667.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,881.08 : 193,376.70 = 69,758.64 : x
  2. Step 2: Convert to fraction form
    128,881.08/193,376.70 = 69,758.64/x
  3. Step 3: Cross multiply
    128,881.08x = 193,376.70 × 69,758.64
  4. Step 4: Simplify right side
    128,881.08x = 13,489,695,599.69
  5. Step 5: Solve for x
    x = 13,489,695,599.69/128,881.08
  6. Step 6: Final answer
    x = 104,667.77

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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.