Home / 103,420.71-142,716.06-63,201.78

Finding the Fourth Proportional to 103,420.71, 142,716.06 and 63,201.78

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Solution

The fourth proportional to 103,420.71, 142,716.06 and 63,201.78 is: 87,215.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,420.71 : 142,716.06 = 63,201.78 : x
  2. Step 2: Convert to fraction form
    103,420.71/142,716.06 = 63,201.78/x
  3. Step 3: Cross multiply
    103,420.71x = 142,716.06 × 63,201.78
  4. Step 4: Simplify right side
    103,420.71x = 9,019,909,026.59
  5. Step 5: Solve for x
    x = 9,019,909,026.59/103,420.71
  6. Step 6: Final answer
    x = 87,215.69

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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.