Home / 420,979.02-631,459.58-136,669.12

Finding the Fourth Proportional to 420,979.02, 631,459.58 and 136,669.12

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Solution

The fourth proportional to 420,979.02, 631,459.58 and 136,669.12 is: 205,000.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,979.02 : 631,459.58 = 136,669.12 : x
  2. Step 2: Convert to fraction form
    420,979.02/631,459.58 = 136,669.12/x
  3. Step 3: Cross multiply
    420,979.02x = 631,459.58 × 136,669.12
  4. Step 4: Simplify right side
    420,979.02x = 86,301,025,114.17
  5. Step 5: Solve for x
    x = 86,301,025,114.17/420,979.02
  6. Step 6: Final answer
    x = 205,000.77

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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.