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Finding the Fourth Proportional to 113,959.20, 170,938.80 and 39,069.30

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Solution

The fourth proportional to 113,959.20, 170,938.80 and 39,069.30 is: 58,603.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,959.20 : 170,938.80 = 39,069.30 : x
  2. Step 2: Convert to fraction form
    113,959.20/170,938.80 = 39,069.30/x
  3. Step 3: Cross multiply
    113,959.20x = 170,938.80 × 39,069.30
  4. Step 4: Simplify right side
    113,959.20x = 6,678,459,258.84
  5. Step 5: Solve for x
    x = 6,678,459,258.84/113,959.20
  6. Step 6: Final answer
    x = 58,603.95

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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.