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Finding the Fourth Proportional to 205,176.40, 307,721.40 and 86,851.60

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Solution

The fourth proportional to 205,176.40, 307,721.40 and 86,851.60 is: 130,259.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,176.40 : 307,721.40 = 86,851.60 : x
  2. Step 2: Convert to fraction form
    205,176.40/307,721.40 = 86,851.60/x
  3. Step 3: Cross multiply
    205,176.40x = 307,721.40 × 86,851.60
  4. Step 4: Simplify right side
    205,176.40x = 26,726,095,944.24
  5. Step 5: Solve for x
    x = 26,726,095,944.24/205,176.40
  6. Step 6: Final answer
    x = 130,259.11

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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.