Home / 133,139.23-183,733.61-72,711.65

Finding the Fourth Proportional to 133,139.23, 183,733.61 and 72,711.65

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Solution

The fourth proportional to 133,139.23, 183,733.61 and 72,711.65 is: 100,342.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,139.23 : 183,733.61 = 72,711.65 : x
  2. Step 2: Convert to fraction form
    133,139.23/183,733.61 = 72,711.65/x
  3. Step 3: Cross multiply
    133,139.23x = 183,733.61 × 72,711.65
  4. Step 4: Simplify right side
    133,139.23x = 13,359,574,039.33
  5. Step 5: Solve for x
    x = 13,359,574,039.33/133,139.23
  6. Step 6: Final answer
    x = 100,342.88

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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.