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Finding the Fourth Proportional to 170,890.60, 256,335.90 and 123,651.40

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Solution

The fourth proportional to 170,890.60, 256,335.90 and 123,651.40 is: 185,477.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,890.60 : 256,335.90 = 123,651.40 : x
  2. Step 2: Convert to fraction form
    170,890.60/256,335.90 = 123,651.40/x
  3. Step 3: Cross multiply
    170,890.60x = 256,335.90 × 123,651.40
  4. Step 4: Simplify right side
    170,890.60x = 31,696,292,905.26
  5. Step 5: Solve for x
    x = 31,696,292,905.26/170,890.60
  6. Step 6: Final answer
    x = 185,477.10

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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.