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Finding the Fourth Proportional to 61,155.36, 91,742.19 and 21,709.17

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Solution

The fourth proportional to 61,155.36, 91,742.19 and 21,709.17 is: 32,567.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,155.36 : 91,742.19 = 21,709.17 : x
  2. Step 2: Convert to fraction form
    61,155.36/91,742.19 = 21,709.17/x
  3. Step 3: Cross multiply
    61,155.36x = 91,742.19 × 21,709.17
  4. Step 4: Simplify right side
    61,155.36x = 1,991,646,798.88
  5. Step 5: Solve for x
    x = 1,991,646,798.88/61,155.36
  6. Step 6: Final answer
    x = 32,567.00

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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.