Home / 128,528.61-192,457.56-103,431.57

Finding the Fourth Proportional to 128,528.61, 192,457.56 and 103,431.57

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Solution

The fourth proportional to 128,528.61, 192,457.56 and 103,431.57 is: 154,877.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,528.61 : 192,457.56 = 103,431.57 : x
  2. Step 2: Convert to fraction form
    128,528.61/192,457.56 = 103,431.57/x
  3. Step 3: Cross multiply
    128,528.61x = 192,457.56 × 103,431.57
  4. Step 4: Simplify right side
    128,528.61x = 19,906,187,589.17
  5. Step 5: Solve for x
    x = 19,906,187,589.17/128,528.61
  6. Step 6: Final answer
    x = 154,877.48

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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.