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Finding the Fourth Proportional to 218,895.36, 328,398.72 and 61,124.16

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Solution

The fourth proportional to 218,895.36, 328,398.72 and 61,124.16 is: 91,701.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,895.36 : 328,398.72 = 61,124.16 : x
  2. Step 2: Convert to fraction form
    218,895.36/328,398.72 = 61,124.16/x
  3. Step 3: Cross multiply
    218,895.36x = 328,398.72 × 61,124.16
  4. Step 4: Simplify right side
    218,895.36x = 20,073,095,905.08
  5. Step 5: Solve for x
    x = 20,073,095,905.08/218,895.36
  6. Step 6: Final answer
    x = 91,701.79

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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.