Home / 128,743.63-177,675.17-71,388.25

Finding the Fourth Proportional to 128,743.63, 177,675.17 and 71,388.25

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Solution

The fourth proportional to 128,743.63, 177,675.17 and 71,388.25 is: 98,520.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,743.63 : 177,675.17 = 71,388.25 : x
  2. Step 2: Convert to fraction form
    128,743.63/177,675.17 = 71,388.25/x
  3. Step 3: Cross multiply
    128,743.63x = 177,675.17 × 71,388.25
  4. Step 4: Simplify right side
    128,743.63x = 12,683,920,054.61
  5. Step 5: Solve for x
    x = 12,683,920,054.61/128,743.63
  6. Step 6: Final answer
    x = 98,520.76

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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.