Home / 72,049.47-99,429.80-39,783.99

Finding the Fourth Proportional to 72,049.47, 99,429.80 and 39,783.99

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Solution

The fourth proportional to 72,049.47, 99,429.80 and 39,783.99 is: 54,902.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,049.47 : 99,429.80 = 39,783.99 : x
  2. Step 2: Convert to fraction form
    72,049.47/99,429.80 = 39,783.99/x
  3. Step 3: Cross multiply
    72,049.47x = 99,429.80 × 39,783.99
  4. Step 4: Simplify right side
    72,049.47x = 3,955,714,342.84
  5. Step 5: Solve for x
    x = 3,955,714,342.84/72,049.47
  6. Step 6: Final answer
    x = 54,902.76

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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.