Home / 128,587.10-192,810.33-102,103.21

Finding the Fourth Proportional to 128,587.10, 192,810.33 and 102,103.21

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Solution

The fourth proportional to 128,587.10, 192,810.33 and 102,103.21 is: 153,098.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,587.10 : 192,810.33 = 102,103.21 : x
  2. Step 2: Convert to fraction form
    128,587.10/192,810.33 = 102,103.21/x
  3. Step 3: Cross multiply
    128,587.10x = 192,810.33 × 102,103.21
  4. Step 4: Simplify right side
    128,587.10x = 19,686,553,614.16
  5. Step 5: Solve for x
    x = 19,686,553,614.16/128,587.10
  6. Step 6: Final answer
    x = 153,098.98

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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.