Home / 72,945.16-100,664.30-39,411.16

Finding the Fourth Proportional to 72,945.16, 100,664.30 and 39,411.16

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Solution

The fourth proportional to 72,945.16, 100,664.30 and 39,411.16 is: 54,387.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,945.16 : 100,664.30 = 39,411.16 : x
  2. Step 2: Convert to fraction form
    72,945.16/100,664.30 = 39,411.16/x
  3. Step 3: Cross multiply
    72,945.16x = 100,664.30 × 39,411.16
  4. Step 4: Simplify right side
    72,945.16x = 3,967,296,680.46
  5. Step 5: Solve for x
    x = 3,967,296,680.46/72,945.16
  6. Step 6: Final answer
    x = 54,387.39

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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.