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Finding the Fourth Proportional to 128,034.84, 192,154.98 and 57,920.28

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Solution

The fourth proportional to 128,034.84, 192,154.98 and 57,920.28 is: 86,926.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,034.84 : 192,154.98 = 57,920.28 : x
  2. Step 2: Convert to fraction form
    128,034.84/192,154.98 = 57,920.28/x
  3. Step 3: Cross multiply
    128,034.84x = 192,154.98 × 57,920.28
  4. Step 4: Simplify right side
    128,034.84x = 11,129,670,244.99
  5. Step 5: Solve for x
    x = 11,129,670,244.99/128,034.84
  6. Step 6: Final answer
    x = 86,926.89

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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.