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Finding the Fourth Proportional to 124,145.77, 186,137.06 and 81,897.01

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Solution

The fourth proportional to 124,145.77, 186,137.06 and 81,897.01 is: 122,791.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,145.77 : 186,137.06 = 81,897.01 : x
  2. Step 2: Convert to fraction form
    124,145.77/186,137.06 = 81,897.01/x
  3. Step 3: Cross multiply
    124,145.77x = 186,137.06 × 81,897.01
  4. Step 4: Simplify right side
    124,145.77x = 15,244,068,254.71
  5. Step 5: Solve for x
    x = 15,244,068,254.71/124,145.77
  6. Step 6: Final answer
    x = 122,791.68

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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.