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Finding the Fourth Proportional to 218,866.40, 328,117.35 and 92,603.60

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Solution

The fourth proportional to 218,866.40, 328,117.35 and 92,603.60 is: 138,828.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,866.40 : 328,117.35 = 92,603.60 : x
  2. Step 2: Convert to fraction form
    218,866.40/328,117.35 = 92,603.60/x
  3. Step 3: Cross multiply
    218,866.40x = 328,117.35 × 92,603.60
  4. Step 4: Simplify right side
    218,866.40x = 30,384,847,832.46
  5. Step 5: Solve for x
    x = 30,384,847,832.46/218,866.40
  6. Step 6: Final answer
    x = 138,828.29

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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.