Home / 78,492.31-117,742.54-25,905.90

Finding the Fourth Proportional to 78,492.31, 117,742.54 and 25,905.90

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Solution

The fourth proportional to 78,492.31, 117,742.54 and 25,905.90 is: 38,860.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,492.31 : 117,742.54 = 25,905.90 : x
  2. Step 2: Convert to fraction form
    78,492.31/117,742.54 = 25,905.90/x
  3. Step 3: Cross multiply
    78,492.31x = 117,742.54 × 25,905.90
  4. Step 4: Simplify right side
    78,492.31x = 3,050,226,466.99
  5. Step 5: Solve for x
    x = 3,050,226,466.99/78,492.31
  6. Step 6: Final answer
    x = 38,860.19

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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.