Home / 72,018.33-99,390.95-39,759.36

Finding the Fourth Proportional to 72,018.33, 99,390.95 and 39,759.36

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Solution

The fourth proportional to 72,018.33, 99,390.95 and 39,759.36 is: 54,871.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,018.33 : 99,390.95 = 39,759.36 : x
  2. Step 2: Convert to fraction form
    72,018.33/99,390.95 = 39,759.36/x
  3. Step 3: Cross multiply
    72,018.33x = 99,390.95 × 39,759.36
  4. Step 4: Simplify right side
    72,018.33x = 3,951,720,139.38
  5. Step 5: Solve for x
    x = 3,951,720,139.38/72,018.33
  6. Step 6: Final answer
    x = 54,871.03

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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.