Home / 128,900.25-193,342.61-76,642.29

Finding the Fourth Proportional to 128,900.25, 193,342.61 and 76,642.29

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Solution

The fourth proportional to 128,900.25, 193,342.61 and 76,642.29 is: 114,958.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,900.25 : 193,342.61 = 76,642.29 : x
  2. Step 2: Convert to fraction form
    128,900.25/193,342.61 = 76,642.29/x
  3. Step 3: Cross multiply
    128,900.25x = 193,342.61 × 76,642.29
  4. Step 4: Simplify right side
    128,900.25x = 14,818,220,001.77
  5. Step 5: Solve for x
    x = 14,818,220,001.77/128,900.25
  6. Step 6: Final answer
    x = 114,958.82

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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.