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Finding the Fourth Proportional to 318,122.45, 477,058.07 and 128,547.01

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Solution

The fourth proportional to 318,122.45, 477,058.07 and 128,547.01 is: 192,769.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,122.45 : 477,058.07 = 128,547.01 : x
  2. Step 2: Convert to fraction form
    318,122.45/477,058.07 = 128,547.01/x
  3. Step 3: Cross multiply
    318,122.45x = 477,058.07 × 128,547.01
  4. Step 4: Simplify right side
    318,122.45x = 61,324,389,412.56
  5. Step 5: Solve for x
    x = 61,324,389,412.56/318,122.45
  6. Step 6: Final answer
    x = 192,769.76

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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.