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Finding the Fourth Proportional to 164,047.30, 245,876.55 and 85,120.90

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Solution

The fourth proportional to 164,047.30, 245,876.55 and 85,120.90 is: 127,580.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,047.30 : 245,876.55 = 85,120.90 : x
  2. Step 2: Convert to fraction form
    164,047.30/245,876.55 = 85,120.90/x
  3. Step 3: Cross multiply
    164,047.30x = 245,876.55 × 85,120.90
  4. Step 4: Simplify right side
    164,047.30x = 20,929,233,224.90
  5. Step 5: Solve for x
    x = 20,929,233,224.90/164,047.30
  6. Step 6: Final answer
    x = 127,580.48

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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.