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Finding the Fourth Proportional to 61,070.34, 91,618.56 and 18,949.50

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Solution

The fourth proportional to 61,070.34, 91,618.56 and 18,949.50 is: 28,428.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,070.34 : 91,618.56 = 18,949.50 : x
  2. Step 2: Convert to fraction form
    61,070.34/91,618.56 = 18,949.50/x
  3. Step 3: Cross multiply
    61,070.34x = 91,618.56 × 18,949.50
  4. Step 4: Simplify right side
    61,070.34x = 1,736,125,902.72
  5. Step 5: Solve for x
    x = 1,736,125,902.72/61,070.34
  6. Step 6: Final answer
    x = 28,428.30

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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.