Home / 100,405,009.49-138,558,912.80-56,352,008.34

Finding the Fourth Proportional to 100,405,009.49, 138,558,912.80 and 56,352,008.34

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Solution

The fourth proportional to 100,405,009.49, 138,558,912.80 and 56,352,008.34 is: 77,765,771.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,405,009.49 : 138,558,912.80 = 56,352,008.34 : x
  2. Step 2: Convert to fraction form
    100,405,009.49/138,558,912.80 = 56,352,008.34/x
  3. Step 3: Cross multiply
    100,405,009.49x = 138,558,912.80 × 56,352,008.34
  4. Step 4: Simplify right side
    100,405,009.49x = 7,808,073,009,405,172
  5. Step 5: Solve for x
    x = 7,808,073,009,405,172/100,405,009.49
  6. Step 6: Final answer
    x = 77,765,771.34

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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.