Home / 142,031.12-213,046.20-79,745.36

Finding the Fourth Proportional to 142,031.12, 213,046.20 and 79,745.36

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Solution

The fourth proportional to 142,031.12, 213,046.20 and 79,745.36 is: 119,617.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,031.12 : 213,046.20 = 79,745.36 : x
  2. Step 2: Convert to fraction form
    142,031.12/213,046.20 = 79,745.36/x
  3. Step 3: Cross multiply
    142,031.12x = 213,046.20 × 79,745.36
  4. Step 4: Simplify right side
    142,031.12x = 16,989,445,915.63
  5. Step 5: Solve for x
    x = 16,989,445,915.63/142,031.12
  6. Step 6: Final answer
    x = 119,617.77

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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.