Home / 72,145.58-99,561.20-39,440.66

Finding the Fourth Proportional to 72,145.58, 99,561.20 and 39,440.66

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Solution

The fourth proportional to 72,145.58, 99,561.20 and 39,440.66 is: 54,428.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,145.58 : 99,561.20 = 39,440.66 : x
  2. Step 2: Convert to fraction form
    72,145.58/99,561.20 = 39,440.66/x
  3. Step 3: Cross multiply
    72,145.58x = 99,561.20 × 39,440.66
  4. Step 4: Simplify right side
    72,145.58x = 3,926,759,039.19
  5. Step 5: Solve for x
    x = 3,926,759,039.19/72,145.58
  6. Step 6: Final answer
    x = 54,428.27

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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.