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Finding the Fourth Proportional to 61,008.40, 91,515.44 and 21,569.50

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Solution

The fourth proportional to 61,008.40, 91,515.44 and 21,569.50 is: 32,355.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,008.40 : 91,515.44 = 21,569.50 : x
  2. Step 2: Convert to fraction form
    61,008.40/91,515.44 = 21,569.50/x
  3. Step 3: Cross multiply
    61,008.40x = 91,515.44 × 21,569.50
  4. Step 4: Simplify right side
    61,008.40x = 1,973,942,283.08
  5. Step 5: Solve for x
    x = 1,973,942,283.08/61,008.40
  6. Step 6: Final answer
    x = 32,355.25

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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.