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Finding the Fourth Proportional to 310,074.18, 465,028 and 85,381.12

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Solution

The fourth proportional to 310,074.18, 465,028 and 85,381.12 is: 128,048.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,074.18 : 465,028 = 85,381.12 : x
  2. Step 2: Convert to fraction form
    310,074.18/465,028 = 85,381.12/x
  3. Step 3: Cross multiply
    310,074.18x = 465,028 × 85,381.12
  4. Step 4: Simplify right side
    310,074.18x = 39,704,611,471.36
  5. Step 5: Solve for x
    x = 39,704,611,471.36/310,074.18
  6. Step 6: Final answer
    x = 128,048.75

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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.