Home / 128,531.23-192,461.50-103,434.19

Finding the Fourth Proportional to 128,531.23, 192,461.50 and 103,434.19

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Solution

The fourth proportional to 128,531.23, 192,461.50 and 103,434.19 is: 154,881.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,531.23 : 192,461.50 = 103,434.19 : x
  2. Step 2: Convert to fraction form
    128,531.23/192,461.50 = 103,434.19/x
  3. Step 3: Cross multiply
    128,531.23x = 192,461.50 × 103,434.19
  4. Step 4: Simplify right side
    128,531.23x = 19,907,099,358.69
  5. Step 5: Solve for x
    x = 19,907,099,358.69/128,531.23
  6. Step 6: Final answer
    x = 154,881.42

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1.5x scale

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.