Home / 109,615.90-164,423.85-91,901.20

Finding the Fourth Proportional to 109,615.90, 164,423.85 and 91,901.20

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Solution

The fourth proportional to 109,615.90, 164,423.85 and 91,901.20 is: 137,851.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,615.90 : 164,423.85 = 91,901.20 : x
  2. Step 2: Convert to fraction form
    109,615.90/164,423.85 = 91,901.20/x
  3. Step 3: Cross multiply
    109,615.90x = 164,423.85 × 91,901.20
  4. Step 4: Simplify right side
    109,615.90x = 15,110,749,123.62
  5. Step 5: Solve for x
    x = 15,110,749,123.62/109,615.90
  6. Step 6: Final answer
    x = 137,851.80

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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.