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Finding the Fourth Proportional to 420,501.33, 630,852.43 and 140,021.01

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Solution

The fourth proportional to 420,501.33, 630,852.43 and 140,021.01 is: 210,064.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,501.33 : 630,852.43 = 140,021.01 : x
  2. Step 2: Convert to fraction form
    420,501.33/630,852.43 = 140,021.01/x
  3. Step 3: Cross multiply
    420,501.33x = 630,852.43 × 140,021.01
  4. Step 4: Simplify right side
    420,501.33x = 88,332,590,905.24
  5. Step 5: Solve for x
    x = 88,332,590,905.24/420,501.33
  6. Step 6: Final answer
    x = 210,064.95

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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.