Home / 109,625.90-164,438.85-91,911.20

Finding the Fourth Proportional to 109,625.90, 164,438.85 and 91,911.20

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Solution

The fourth proportional to 109,625.90, 164,438.85 and 91,911.20 is: 137,866.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,625.90 : 164,438.85 = 91,911.20 : x
  2. Step 2: Convert to fraction form
    109,625.90/164,438.85 = 91,911.20/x
  3. Step 3: Cross multiply
    109,625.90x = 164,438.85 × 91,911.20
  4. Step 4: Simplify right side
    109,625.90x = 15,113,772,030.12
  5. Step 5: Solve for x
    x = 15,113,772,030.12/109,625.90
  6. Step 6: Final answer
    x = 137,866.80

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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.