Home / 77,639.63-107,128.35-43,643.61

Finding the Fourth Proportional to 77,639.63, 107,128.35 and 43,643.61

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Solution

The fourth proportional to 77,639.63, 107,128.35 and 43,643.61 is: 60,220.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,639.63 : 107,128.35 = 43,643.61 : x
  2. Step 2: Convert to fraction form
    77,639.63/107,128.35 = 43,643.61/x
  3. Step 3: Cross multiply
    77,639.63x = 107,128.35 × 43,643.61
  4. Step 4: Simplify right side
    77,639.63x = 4,675,467,927.34
  5. Step 5: Solve for x
    x = 4,675,467,927.34/77,639.63
  6. Step 6: Final answer
    x = 60,220.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.