Home / 426,382.08-639,461.70-126,782.04

Finding the Fourth Proportional to 426,382.08, 639,461.70 and 126,782.04

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Solution

The fourth proportional to 426,382.08, 639,461.70 and 126,782.04 is: 190,139.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,382.08 : 639,461.70 = 126,782.04 : x
  2. Step 2: Convert to fraction form
    426,382.08/639,461.70 = 126,782.04/x
  3. Step 3: Cross multiply
    426,382.08x = 639,461.70 × 126,782.04
  4. Step 4: Simplify right side
    426,382.08x = 81,072,258,827.87
  5. Step 5: Solve for x
    x = 81,072,258,827.87/426,382.08
  6. Step 6: Final answer
    x = 190,139.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.