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Finding the Fourth Proportional to 103,485.42, 142,799.13 and 63,208.98

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Solution

The fourth proportional to 103,485.42, 142,799.13 and 63,208.98 is: 87,221.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,485.42 : 142,799.13 = 63,208.98 : x
  2. Step 2: Convert to fraction form
    103,485.42/142,799.13 = 63,208.98/x
  3. Step 3: Cross multiply
    103,485.42x = 142,799.13 × 63,208.98
  4. Step 4: Simplify right side
    103,485.42x = 9,026,187,352.19
  5. Step 5: Solve for x
    x = 9,026,187,352.19/103,485.42
  6. Step 6: Final answer
    x = 87,221.83

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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.