Home / 128,106.07-192,156.45-42,723.08

Finding the Fourth Proportional to 128,106.07, 192,156.45 and 42,723.08

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Solution

The fourth proportional to 128,106.07, 192,156.45 and 42,723.08 is: 64,083.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,106.07 : 192,156.45 = 42,723.08 : x
  2. Step 2: Convert to fraction form
    128,106.07/192,156.45 = 42,723.08/x
  3. Step 3: Cross multiply
    128,106.07x = 192,156.45 × 42,723.08
  4. Step 4: Simplify right side
    128,106.07x = 8,209,515,385.87
  5. Step 5: Solve for x
    x = 8,209,515,385.87/128,106.07
  6. Step 6: Final answer
    x = 64,083.73

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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.