Home / 109,911.30-165,061.35-85,011.90

Finding the Fourth Proportional to 109,911.30, 165,061.35 and 85,011.90

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Solution

The fourth proportional to 109,911.30, 165,061.35 and 85,011.90 is: 127,668.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,911.30 : 165,061.35 = 85,011.90 : x
  2. Step 2: Convert to fraction form
    109,911.30/165,061.35 = 85,011.90/x
  3. Step 3: Cross multiply
    109,911.30x = 165,061.35 × 85,011.90
  4. Step 4: Simplify right side
    109,911.30x = 14,032,178,980.07
  5. Step 5: Solve for x
    x = 14,032,178,980.07/109,911.30
  6. Step 6: Final answer
    x = 127,668.21

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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.