Home / 72,724,911.36-100,362,507.29-39,687,289.58

Finding the Fourth Proportional to 72,724,911.36, 100,362,507.29 and 39,687,289.58

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Solution

The fourth proportional to 72,724,911.36, 100,362,507.29 and 39,687,289.58 is: 54,769,621.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,724,911.36 : 100,362,507.29 = 39,687,289.58 : x
  2. Step 2: Convert to fraction form
    72,724,911.36/100,362,507.29 = 39,687,289.58/x
  3. Step 3: Cross multiply
    72,724,911.36x = 100,362,507.29 × 39,687,289.58
  4. Step 4: Simplify right side
    72,724,911.36x = 3,983,115,889,092,842
  5. Step 5: Solve for x
    x = 3,983,115,889,092,842/72,724,911.36
  6. Step 6: Final answer
    x = 54,769,621.78

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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.