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Finding the Fourth Proportional to 85,968.89, 128,952.81 and 46,775.12

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Solution

The fourth proportional to 85,968.89, 128,952.81 and 46,775.12 is: 70,162.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,968.89 : 128,952.81 = 46,775.12 : x
  2. Step 2: Convert to fraction form
    85,968.89/128,952.81 = 46,775.12/x
  3. Step 3: Cross multiply
    85,968.89x = 128,952.81 × 46,775.12
  4. Step 4: Simplify right side
    85,968.89x = 6,031,783,242.68
  5. Step 5: Solve for x
    x = 6,031,783,242.68/85,968.89
  6. Step 6: Final answer
    x = 70,162.39

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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.