Home / 85,109.40-127,664.10-21,929.40

Finding the Fourth Proportional to 85,109.40, 127,664.10 and 21,929.40

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Solution

The fourth proportional to 85,109.40, 127,664.10 and 21,929.40 is: 32,894.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,109.40 : 127,664.10 = 21,929.40 : x
  2. Step 2: Convert to fraction form
    85,109.40/127,664.10 = 21,929.40/x
  3. Step 3: Cross multiply
    85,109.40x = 127,664.10 × 21,929.40
  4. Step 4: Simplify right side
    85,109.40x = 2,799,597,114.54
  5. Step 5: Solve for x
    x = 2,799,597,114.54/85,109.40
  6. Step 6: Final answer
    x = 32,894.10

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1.5x scale

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.