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Finding the Fourth Proportional to 85,450.12, 128,154.12 and 38,693.68

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Solution

The fourth proportional to 85,450.12, 128,154.12 and 38,693.68 is: 58,030.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,450.12 : 128,154.12 = 38,693.68 : x
  2. Step 2: Convert to fraction form
    85,450.12/128,154.12 = 38,693.68/x
  3. Step 3: Cross multiply
    85,450.12x = 128,154.12 × 38,693.68
  4. Step 4: Simplify right side
    85,450.12x = 4,958,754,509.96
  5. Step 5: Solve for x
    x = 4,958,754,509.96/85,450.12
  6. Step 6: Final answer
    x = 58,030.98

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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.