Home / 78,203.60-117,305.40-28,272.02

Finding the Fourth Proportional to 78,203.60, 117,305.40 and 28,272.02

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Solution

The fourth proportional to 78,203.60, 117,305.40 and 28,272.02 is: 42,408.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,203.60 : 117,305.40 = 28,272.02 : x
  2. Step 2: Convert to fraction form
    78,203.60/117,305.40 = 28,272.02/x
  3. Step 3: Cross multiply
    78,203.60x = 117,305.40 × 28,272.02
  4. Step 4: Simplify right side
    78,203.60x = 3,316,459,887.02
  5. Step 5: Solve for x
    x = 3,316,459,887.02/78,203.60
  6. Step 6: Final answer
    x = 42,408.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.