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Finding the Fourth Proportional to 61,071.90, 91,620.94 and 18,951.08

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Solution

The fourth proportional to 61,071.90, 91,620.94 and 18,951.08 is: 28,430.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,071.90 : 91,620.94 = 18,951.08 : x
  2. Step 2: Convert to fraction form
    61,071.90/91,620.94 = 18,951.08/x
  3. Step 3: Cross multiply
    61,071.90x = 91,620.94 × 18,951.08
  4. Step 4: Simplify right side
    61,071.90x = 1,736,315,763.62
  5. Step 5: Solve for x
    x = 1,736,315,763.62/61,071.90
  6. Step 6: Final answer
    x = 28,430.68

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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.