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Finding the Fourth Proportional to 420,925.01, 631,386.97 and 105,381.88

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Solution

The fourth proportional to 420,925.01, 631,386.97 and 105,381.88 is: 158,072.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,925.01 : 631,386.97 = 105,381.88 : x
  2. Step 2: Convert to fraction form
    420,925.01/631,386.97 = 105,381.88/x
  3. Step 3: Cross multiply
    420,925.01x = 631,386.97 × 105,381.88
  4. Step 4: Simplify right side
    420,925.01x = 66,536,744,064.18
  5. Step 5: Solve for x
    x = 66,536,744,064.18/420,925.01
  6. Step 6: Final answer
    x = 158,072.68

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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.