Home / 288,723.07-432,976.74-99,129.61

Finding the Fourth Proportional to 288,723.07, 432,976.74 and 99,129.61

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Solution

The fourth proportional to 288,723.07, 432,976.74 and 99,129.61 is: 148,657.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,723.07 : 432,976.74 = 99,129.61 : x
  2. Step 2: Convert to fraction form
    288,723.07/432,976.74 = 99,129.61/x
  3. Step 3: Cross multiply
    288,723.07x = 432,976.74 × 99,129.61
  4. Step 4: Simplify right side
    288,723.07x = 42,920,815,375.27
  5. Step 5: Solve for x
    x = 42,920,815,375.27/288,723.07
  6. Step 6: Final answer
    x = 148,657.38

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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.