Home / 72,145.49-99,562.97-40,315.73

Finding the Fourth Proportional to 72,145.49, 99,562.97 and 40,315.73

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Solution

The fourth proportional to 72,145.49, 99,562.97 and 40,315.73 is: 55,636.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,145.49 : 99,562.97 = 40,315.73 : x
  2. Step 2: Convert to fraction form
    72,145.49/99,562.97 = 40,315.73/x
  3. Step 3: Cross multiply
    72,145.49x = 99,562.97 × 40,315.73
  4. Step 4: Simplify right side
    72,145.49x = 4,013,953,419.49
  5. Step 5: Solve for x
    x = 4,013,953,419.49/72,145.49
  6. Step 6: Final answer
    x = 55,636.93

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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.