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Finding the Fourth Proportional to 318,356.51, 477,593.82 and 105,139.19

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Solution

The fourth proportional to 318,356.51, 477,593.82 and 105,139.19 is: 157,728.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,356.51 : 477,593.82 = 105,139.19 : x
  2. Step 2: Convert to fraction form
    318,356.51/477,593.82 = 105,139.19/x
  3. Step 3: Cross multiply
    318,356.51x = 477,593.82 × 105,139.19
  4. Step 4: Simplify right side
    318,356.51x = 50,213,828,577.79
  5. Step 5: Solve for x
    x = 50,213,828,577.79/318,356.51
  6. Step 6: Final answer
    x = 157,728.29

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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.