Home / 128,830.86-193,308.12-66,501.36

Finding the Fourth Proportional to 128,830.86, 193,308.12 and 66,501.36

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Solution

The fourth proportional to 128,830.86, 193,308.12 and 66,501.36 is: 99,783.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,830.86 : 193,308.12 = 66,501.36 : x
  2. Step 2: Convert to fraction form
    128,830.86/193,308.12 = 66,501.36/x
  3. Step 3: Cross multiply
    128,830.86x = 193,308.12 × 66,501.36
  4. Step 4: Simplify right side
    128,830.86x = 12,855,252,879.04
  5. Step 5: Solve for x
    x = 12,855,252,879.04/128,830.86
  6. Step 6: Final answer
    x = 99,783.96

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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.