Home / 72,146.05-99,559.64-40,315.21

Finding the Fourth Proportional to 72,146.05, 99,559.64 and 40,315.21

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Solution

The fourth proportional to 72,146.05, 99,559.64 and 40,315.21 is: 55,633.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,146.05 : 99,559.64 = 40,315.21 : x
  2. Step 2: Convert to fraction form
    72,146.05/99,559.64 = 40,315.21/x
  3. Step 3: Cross multiply
    72,146.05x = 99,559.64 × 40,315.21
  4. Step 4: Simplify right side
    72,146.05x = 4,013,767,794.12
  5. Step 5: Solve for x
    x = 4,013,767,794.12/72,146.05
  6. Step 6: Final answer
    x = 55,633.92

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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.