Home / 72,122.05-99,528.18-39,855.77

Finding the Fourth Proportional to 72,122.05, 99,528.18 and 39,855.77

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Solution

The fourth proportional to 72,122.05, 99,528.18 and 39,855.77 is: 55,000.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,122.05 : 99,528.18 = 39,855.77 : x
  2. Step 2: Convert to fraction form
    72,122.05/99,528.18 = 39,855.77/x
  3. Step 3: Cross multiply
    72,122.05x = 99,528.18 × 39,855.77
  4. Step 4: Simplify right side
    72,122.05x = 3,966,772,250.60
  5. Step 5: Solve for x
    x = 3,966,772,250.60/72,122.05
  6. Step 6: Final answer
    x = 55,000.82

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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.