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Finding the Fourth Proportional to 170,042.20, 255,055.20 and 57,711.40

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Solution

The fourth proportional to 170,042.20, 255,055.20 and 57,711.40 is: 86,564.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,042.20 : 255,055.20 = 57,711.40 : x
  2. Step 2: Convert to fraction form
    170,042.20/255,055.20 = 57,711.40/x
  3. Step 3: Cross multiply
    170,042.20x = 255,055.20 × 57,711.40
  4. Step 4: Simplify right side
    170,042.20x = 14,719,592,669.28
  5. Step 5: Solve for x
    x = 14,719,592,669.28/170,042.20
  6. Step 6: Final answer
    x = 86,564.35

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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.