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Finding the Fourth Proportional to 85,610.80, 128,416.38 and 46,186.48

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Solution

The fourth proportional to 85,610.80, 128,416.38 and 46,186.48 is: 69,279.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,610.80 : 128,416.38 = 46,186.48 : x
  2. Step 2: Convert to fraction form
    85,610.80/128,416.38 = 46,186.48/x
  3. Step 3: Cross multiply
    85,610.80x = 128,416.38 × 46,186.48
  4. Step 4: Simplify right side
    85,610.80x = 5,931,100,566.54
  5. Step 5: Solve for x
    x = 5,931,100,566.54/85,610.80
  6. Step 6: Final answer
    x = 69,279.82

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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.