Home / 72,945.36-100,664.58-39,411.36

Finding the Fourth Proportional to 72,945.36, 100,664.58 and 39,411.36

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Solution

The fourth proportional to 72,945.36, 100,664.58 and 39,411.36 is: 54,387.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,945.36 : 100,664.58 = 39,411.36 : x
  2. Step 2: Convert to fraction form
    72,945.36/100,664.58 = 39,411.36/x
  3. Step 3: Cross multiply
    72,945.36x = 100,664.58 × 39,411.36
  4. Step 4: Simplify right side
    72,945.36x = 3,967,328,001.63
  5. Step 5: Solve for x
    x = 3,967,328,001.63/72,945.36
  6. Step 6: Final answer
    x = 54,387.67

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1.5x scale

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.