Home / 426,389.02-639,574.75-142,100.21

Finding the Fourth Proportional to 426,389.02, 639,574.75 and 142,100.21

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Solution

The fourth proportional to 426,389.02, 639,574.75 and 142,100.21 is: 213,147.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,389.02 : 639,574.75 = 142,100.21 : x
  2. Step 2: Convert to fraction form
    426,389.02/639,574.75 = 142,100.21/x
  3. Step 3: Cross multiply
    426,389.02x = 639,574.75 × 142,100.21
  4. Step 4: Simplify right side
    426,389.02x = 90,883,706,285.70
  5. Step 5: Solve for x
    x = 90,883,706,285.70/426,389.02
  6. Step 6: Final answer
    x = 213,147.39

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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.