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Finding the Fourth Proportional to 218,941.30, 328,374.42 and 61,133.32

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Solution

The fourth proportional to 218,941.30, 328,374.42 and 61,133.32 is: 91,689.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,941.30 : 328,374.42 = 61,133.32 : x
  2. Step 2: Convert to fraction form
    218,941.30/328,374.42 = 61,133.32/x
  3. Step 3: Cross multiply
    218,941.30x = 328,374.42 × 61,133.32
  4. Step 4: Simplify right side
    218,941.30x = 20,074,618,497.67
  5. Step 5: Solve for x
    x = 20,074,618,497.67/218,941.30
  6. Step 6: Final answer
    x = 91,689.50

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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.