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Finding the Fourth Proportional to 164,042.80, 245,869.80 and 85,116.40

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Solution

The fourth proportional to 164,042.80, 245,869.80 and 85,116.40 is: 127,573.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,042.80 : 245,869.80 = 85,116.40 : x
  2. Step 2: Convert to fraction form
    164,042.80/245,869.80 = 85,116.40/x
  3. Step 3: Cross multiply
    164,042.80x = 245,869.80 × 85,116.40
  4. Step 4: Simplify right side
    164,042.80x = 20,927,552,244.72
  5. Step 5: Solve for x
    x = 20,927,552,244.72/164,042.80
  6. Step 6: Final answer
    x = 127,573.73

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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.