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Finding the Fourth Proportional to 85,778.48, 128,666.80 and 35,166.22

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Solution

The fourth proportional to 85,778.48, 128,666.80 and 35,166.22 is: 52,748.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,778.48 : 128,666.80 = 35,166.22 : x
  2. Step 2: Convert to fraction form
    85,778.48/128,666.80 = 35,166.22/x
  3. Step 3: Cross multiply
    85,778.48x = 128,666.80 × 35,166.22
  4. Step 4: Simplify right side
    85,778.48x = 4,524,724,995.50
  5. Step 5: Solve for x
    x = 4,524,724,995.50/85,778.48
  6. Step 6: Final answer
    x = 52,748.95

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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.