Home / 426,391.02-639,577.75-142,102.21

Finding the Fourth Proportional to 426,391.02, 639,577.75 and 142,102.21

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Solution

The fourth proportional to 426,391.02, 639,577.75 and 142,102.21 is: 213,150.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,391.02 : 639,577.75 = 142,102.21 : x
  2. Step 2: Convert to fraction form
    426,391.02/639,577.75 = 142,102.21/x
  3. Step 3: Cross multiply
    426,391.02x = 639,577.75 × 142,102.21
  4. Step 4: Simplify right side
    426,391.02x = 90,885,411,741.83
  5. Step 5: Solve for x
    x = 90,885,411,741.83/426,391.02
  6. Step 6: Final answer
    x = 213,150.39

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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.