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Finding the Fourth Proportional to 138,314.84, 190,892.67 and 77,897.30

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Solution

The fourth proportional to 138,314.84, 190,892.67 and 77,897.30 is: 107,508.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,314.84 : 190,892.67 = 77,897.30 : x
  2. Step 2: Convert to fraction form
    138,314.84/190,892.67 = 77,897.30/x
  3. Step 3: Cross multiply
    138,314.84x = 190,892.67 × 77,897.30
  4. Step 4: Simplify right side
    138,314.84x = 14,870,023,582.79
  5. Step 5: Solve for x
    x = 14,870,023,582.79/138,314.84
  6. Step 6: Final answer
    x = 107,508.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.