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Finding the Fourth Proportional to 170,501.64, 255,910.20 and 86,320.95

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Solution

The fourth proportional to 170,501.64, 255,910.20 and 86,320.95 is: 129,561.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,501.64 : 255,910.20 = 86,320.95 : x
  2. Step 2: Convert to fraction form
    170,501.64/255,910.20 = 86,320.95/x
  3. Step 3: Cross multiply
    170,501.64x = 255,910.20 × 86,320.95
  4. Step 4: Simplify right side
    170,501.64x = 22,090,411,578.69
  5. Step 5: Solve for x
    x = 22,090,411,578.69/170,501.64
  6. Step 6: Final answer
    x = 129,561.29

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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.