Home / 122,945.20-183,980.40-85,328.80

Finding the Fourth Proportional to 122,945.20, 183,980.40 and 85,328.80

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Solution

The fourth proportional to 122,945.20, 183,980.40 and 85,328.80 is: 127,689.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,945.20 : 183,980.40 = 85,328.80 : x
  2. Step 2: Convert to fraction form
    122,945.20/183,980.40 = 85,328.80/x
  3. Step 3: Cross multiply
    122,945.20x = 183,980.40 × 85,328.80
  4. Step 4: Simplify right side
    122,945.20x = 15,698,826,755.52
  5. Step 5: Solve for x
    x = 15,698,826,755.52/122,945.20
  6. Step 6: Final answer
    x = 127,689.63

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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.