Home / 420,827.13-631,329.47-136,495.60

Finding the Fourth Proportional to 420,827.13, 631,329.47 and 136,495.60

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Solution

The fourth proportional to 420,827.13, 631,329.47 and 136,495.60 is: 204,772.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,827.13 : 631,329.47 = 136,495.60 : x
  2. Step 2: Convert to fraction form
    420,827.13/631,329.47 = 136,495.60/x
  3. Step 3: Cross multiply
    420,827.13x = 631,329.47 × 136,495.60
  4. Step 4: Simplify right side
    420,827.13x = 86,173,693,824.18
  5. Step 5: Solve for x
    x = 86,173,693,824.18/420,827.13
  6. Step 6: Final answer
    x = 204,772.19

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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.