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Finding the Fourth Proportional to 318,058.72, 477,146.40 and 130,968.16

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Solution

The fourth proportional to 318,058.72, 477,146.40 and 130,968.16 is: 196,476.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,058.72 : 477,146.40 = 130,968.16 : x
  2. Step 2: Convert to fraction form
    318,058.72/477,146.40 = 130,968.16/x
  3. Step 3: Cross multiply
    318,058.72x = 477,146.40 × 130,968.16
  4. Step 4: Simplify right side
    318,058.72x = 62,490,986,058.62
  5. Step 5: Solve for x
    x = 62,490,986,058.62/318,058.72
  6. Step 6: Final answer
    x = 196,476.25

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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.