Home / 103,203.07-142,425.99-77,663.50

Finding the Fourth Proportional to 103,203.07, 142,425.99 and 77,663.50

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Solution

The fourth proportional to 103,203.07, 142,425.99 and 77,663.50 is: 107,179.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,203.07 : 142,425.99 = 77,663.50 : x
  2. Step 2: Convert to fraction form
    103,203.07/142,425.99 = 77,663.50/x
  3. Step 3: Cross multiply
    103,203.07x = 142,425.99 × 77,663.50
  4. Step 4: Simplify right side
    103,203.07x = 11,061,300,874.37
  5. Step 5: Solve for x
    x = 11,061,300,874.37/103,203.07
  6. Step 6: Final answer
    x = 107,179.96

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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.