Home / 420,755.58-631,138.95-140,272.92

Finding the Fourth Proportional to 420,755.58, 631,138.95 and 140,272.92

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Solution

The fourth proportional to 420,755.58, 631,138.95 and 140,272.92 is: 210,411.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,755.58 : 631,138.95 = 140,272.92 : x
  2. Step 2: Convert to fraction form
    420,755.58/631,138.95 = 140,272.92/x
  3. Step 3: Cross multiply
    420,755.58x = 631,138.95 × 140,272.92
  4. Step 4: Simplify right side
    420,755.58x = 88,531,703,442.23
  5. Step 5: Solve for x
    x = 88,531,703,442.23/420,755.58
  6. Step 6: Final answer
    x = 210,411.24

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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.