Home / 420,904.37-631,192.79-136,526.15

Finding the Fourth Proportional to 420,904.37, 631,192.79 and 136,526.15

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Solution

The fourth proportional to 420,904.37, 631,192.79 and 136,526.15 is: 204,736.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,904.37 : 631,192.79 = 136,526.15 : x
  2. Step 2: Convert to fraction form
    420,904.37/631,192.79 = 136,526.15/x
  3. Step 3: Cross multiply
    420,904.37x = 631,192.79 × 136,526.15
  4. Step 4: Simplify right side
    420,904.37x = 86,174,323,445.76
  5. Step 5: Solve for x
    x = 86,174,323,445.76/420,904.37
  6. Step 6: Final answer
    x = 204,736.11

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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.