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Finding the Fourth Proportional to 124,003.60, 186,005.40 and 86,678.80

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Solution

The fourth proportional to 124,003.60, 186,005.40 and 86,678.80 is: 130,018.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,003.60 : 186,005.40 = 86,678.80 : x
  2. Step 2: Convert to fraction form
    124,003.60/186,005.40 = 86,678.80/x
  3. Step 3: Cross multiply
    124,003.60x = 186,005.40 × 86,678.80
  4. Step 4: Simplify right side
    124,003.60x = 16,122,724,865.52
  5. Step 5: Solve for x
    x = 16,122,724,865.52/124,003.60
  6. Step 6: Final answer
    x = 130,018.20

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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.