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Finding the Fourth Proportional to 61,120.50, 91,695.10 and 18,998.42

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Solution

The fourth proportional to 61,120.50, 91,695.10 and 18,998.42 is: 28,502.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,120.50 : 91,695.10 = 18,998.42 : x
  2. Step 2: Convert to fraction form
    61,120.50/91,695.10 = 18,998.42/x
  3. Step 3: Cross multiply
    61,120.50x = 91,695.10 × 18,998.42
  4. Step 4: Simplify right side
    61,120.50x = 1,742,062,021.74
  5. Step 5: Solve for x
    x = 1,742,062,021.74/61,120.50
  6. Step 6: Final answer
    x = 28,502.09

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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.