Home / 78,486.90-117,750.21-34,121.58

Finding the Fourth Proportional to 78,486.90, 117,750.21 and 34,121.58

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Solution

The fourth proportional to 78,486.90, 117,750.21 and 34,121.58 is: 51,191.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,486.90 : 117,750.21 = 34,121.58 : x
  2. Step 2: Convert to fraction form
    78,486.90/117,750.21 = 34,121.58/x
  3. Step 3: Cross multiply
    78,486.90x = 117,750.21 × 34,121.58
  4. Step 4: Simplify right side
    78,486.90x = 4,017,823,210.53
  5. Step 5: Solve for x
    x = 4,017,823,210.53/78,486.90
  6. Step 6: Final answer
    x = 51,191.00

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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.