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Finding the Fourth Proportional to 85,606.65, 128,433.60 and 35,710.20

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Solution

The fourth proportional to 85,606.65, 128,433.60 and 35,710.20 is: 53,575.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,606.65 : 128,433.60 = 35,710.20 : x
  2. Step 2: Convert to fraction form
    85,606.65/128,433.60 = 35,710.20/x
  3. Step 3: Cross multiply
    85,606.65x = 128,433.60 × 35,710.20
  4. Step 4: Simplify right side
    85,606.65x = 4,586,389,542.72
  5. Step 5: Solve for x
    x = 4,586,389,542.72/85,606.65
  6. Step 6: Final answer
    x = 53,575.15

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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.