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Finding the Fourth Proportional to 205,637.40, 308,225.70 and 87,288.60

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Solution

The fourth proportional to 205,637.40, 308,225.70 and 87,288.60 is: 130,835.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,637.40 : 308,225.70 = 87,288.60 : x
  2. Step 2: Convert to fraction form
    205,637.40/308,225.70 = 87,288.60/x
  3. Step 3: Cross multiply
    205,637.40x = 308,225.70 × 87,288.60
  4. Step 4: Simplify right side
    205,637.40x = 26,904,589,837.02
  5. Step 5: Solve for x
    x = 26,904,589,837.02/205,637.40
  6. Step 6: Final answer
    x = 130,835.10

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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.