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Finding the Fourth Proportional to 103,900.80, 143,384.64 and 59,187.84

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Solution

The fourth proportional to 103,900.80, 143,384.64 and 59,187.84 is: 81,680.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,900.80 : 143,384.64 = 59,187.84 : x
  2. Step 2: Convert to fraction form
    103,900.80/143,384.64 = 59,187.84/x
  3. Step 3: Cross multiply
    103,900.80x = 143,384.64 × 59,187.84
  4. Step 4: Simplify right side
    103,900.80x = 8,486,627,130.78
  5. Step 5: Solve for x
    x = 8,486,627,130.78/103,900.80
  6. Step 6: Final answer
    x = 81,680.09

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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.