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Finding the Fourth Proportional to 85,341.79, 128,012.55 and 35,388.55

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Solution

The fourth proportional to 85,341.79, 128,012.55 and 35,388.55 is: 53,082.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,341.79 : 128,012.55 = 35,388.55 : x
  2. Step 2: Convert to fraction form
    85,341.79/128,012.55 = 35,388.55/x
  3. Step 3: Cross multiply
    85,341.79x = 128,012.55 × 35,388.55
  4. Step 4: Simplify right side
    85,341.79x = 4,530,178,526.30
  5. Step 5: Solve for x
    x = 4,530,178,526.30/85,341.79
  6. Step 6: Final answer
    x = 53,082.77

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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.