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Finding the Fourth Proportional to 78,964.84, 118,434.28 and 28,353.38

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Solution

The fourth proportional to 78,964.84, 118,434.28 and 28,353.38 is: 42,525.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,964.84 : 118,434.28 = 28,353.38 : x
  2. Step 2: Convert to fraction form
    78,964.84/118,434.28 = 28,353.38/x
  3. Step 3: Cross multiply
    78,964.84x = 118,434.28 × 28,353.38
  4. Step 4: Simplify right side
    78,964.84x = 3,358,012,371.07
  5. Step 5: Solve for x
    x = 3,358,012,371.07/78,964.84
  6. Step 6: Final answer
    x = 42,525.41

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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.