Home / 132,638.72-198,698.88-70,223.36

Finding the Fourth Proportional to 132,638.72, 198,698.88 and 70,223.36

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Solution

The fourth proportional to 132,638.72, 198,698.88 and 70,223.36 is: 105,197.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,638.72 : 198,698.88 = 70,223.36 : x
  2. Step 2: Convert to fraction form
    132,638.72/198,698.88 = 70,223.36/x
  3. Step 3: Cross multiply
    132,638.72x = 198,698.88 × 70,223.36
  4. Step 4: Simplify right side
    132,638.72x = 13,953,302,981.84
  5. Step 5: Solve for x
    x = 13,953,302,981.84/132,638.72
  6. Step 6: Final answer
    x = 105,197.81

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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.