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Finding the Fourth Proportional to 85,958.97, 128,966.47 and 43,242.35

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Solution

The fourth proportional to 85,958.97, 128,966.47 and 43,242.35 is: 64,877.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,958.97 : 128,966.47 = 43,242.35 : x
  2. Step 2: Convert to fraction form
    85,958.97/128,966.47 = 43,242.35/x
  3. Step 3: Cross multiply
    85,958.97x = 128,966.47 × 43,242.35
  4. Step 4: Simplify right side
    85,958.97x = 5,576,812,964.69
  5. Step 5: Solve for x
    x = 5,576,812,964.69/85,958.97
  6. Step 6: Final answer
    x = 64,877.62

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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.