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Finding the Fourth Proportional to 128,610.76, 192,916.16 and 53,690.02

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Solution

The fourth proportional to 128,610.76, 192,916.16 and 53,690.02 is: 80,535.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,610.76 : 192,916.16 = 53,690.02 : x
  2. Step 2: Convert to fraction form
    128,610.76/192,916.16 = 53,690.02/x
  3. Step 3: Cross multiply
    128,610.76x = 192,916.16 × 53,690.02
  4. Step 4: Simplify right side
    128,610.76x = 10,357,672,488.72
  5. Step 5: Solve for x
    x = 10,357,672,488.72/128,610.76
  6. Step 6: Final answer
    x = 80,535.04

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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.