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Finding the Fourth Proportional to 164,842.80, 247,069.80 and 85,916.40

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Solution

The fourth proportional to 164,842.80, 247,069.80 and 85,916.40 is: 128,773.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,842.80 : 247,069.80 = 85,916.40 : x
  2. Step 2: Convert to fraction form
    164,842.80/247,069.80 = 85,916.40/x
  3. Step 3: Cross multiply
    164,842.80x = 247,069.80 × 85,916.40
  4. Step 4: Simplify right side
    164,842.80x = 21,227,347,764.72
  5. Step 5: Solve for x
    x = 21,227,347,764.72/164,842.80
  6. Step 6: Final answer
    x = 128,773.28

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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.