Home / 128,909.15-193,368.96-61,406.48

Finding the Fourth Proportional to 128,909.15, 193,368.96 and 61,406.48

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Solution

The fourth proportional to 128,909.15, 193,368.96 and 61,406.48 is: 92,112.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,909.15 : 193,368.96 = 61,406.48 : x
  2. Step 2: Convert to fraction form
    128,909.15/193,368.96 = 61,406.48/x
  3. Step 3: Cross multiply
    128,909.15x = 193,368.96 × 61,406.48
  4. Step 4: Simplify right side
    128,909.15x = 11,874,107,174.86
  5. Step 5: Solve for x
    x = 11,874,107,174.86/128,909.15
  6. Step 6: Final answer
    x = 92,112.21

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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.