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Finding the Fourth Proportional to 74,428.84, 111,595.02 and 39,385

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Solution

The fourth proportional to 74,428.84, 111,595.02 and 39,385 is: 59,051.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,428.84 : 111,595.02 = 39,385 : x
  2. Step 2: Convert to fraction form
    74,428.84/111,595.02 = 39,385/x
  3. Step 3: Cross multiply
    74,428.84x = 111,595.02 × 39,385
  4. Step 4: Simplify right side
    74,428.84x = 4,395,169,862.70
  5. Step 5: Solve for x
    x = 4,395,169,862.70/74,428.84
  6. Step 6: Final answer
    x = 59,051.97

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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.