Home / 138,543,989.76-191,192,406.48-76,670,085.60

Finding the Fourth Proportional to 138,543,989.76, 191,192,406.48 and 76,670,085.60

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Solution

The fourth proportional to 138,543,989.76, 191,192,406.48 and 76,670,085.60 is: 105,805,659.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,543,989.76 : 191,192,406.48 = 76,670,085.60 : x
  2. Step 2: Convert to fraction form
    138,543,989.76/191,192,406.48 = 76,670,085.60/x
  3. Step 3: Cross multiply
    138,543,989.76x = 191,192,406.48 × 76,670,085.60
  4. Step 4: Simplify right side
    138,543,989.76x = 14,658,738,170,891,592
  5. Step 5: Solve for x
    x = 14,658,738,170,891,592/138,543,989.76
  6. Step 6: Final answer
    x = 105,805,659.24

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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.