Home / 423,144.64-634,719.12-142,664.32

Finding the Fourth Proportional to 423,144.64, 634,719.12 and 142,664.32

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Solution

The fourth proportional to 423,144.64, 634,719.12 and 142,664.32 is: 213,997.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,144.64 : 634,719.12 = 142,664.32 : x
  2. Step 2: Convert to fraction form
    423,144.64/634,719.12 = 142,664.32/x
  3. Step 3: Cross multiply
    423,144.64x = 634,719.12 × 142,664.32
  4. Step 4: Simplify right side
    423,144.64x = 90,551,771,645.80
  5. Step 5: Solve for x
    x = 90,551,771,645.80/423,144.64
  6. Step 6: Final answer
    x = 213,997.21

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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.