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Finding the Fourth Proportional to 316,152, 474,252.75 and 91,515.81

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Solution

The fourth proportional to 316,152, 474,252.75 and 91,515.81 is: 137,280.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,152 : 474,252.75 = 91,515.81 : x
  2. Step 2: Convert to fraction form
    316,152/474,252.75 = 91,515.81/x
  3. Step 3: Cross multiply
    316,152x = 474,252.75 × 91,515.81
  4. Step 4: Simplify right side
    316,152x = 43,401,624,560.98
  5. Step 5: Solve for x
    x = 43,401,624,560.98/316,152
  6. Step 6: Final answer
    x = 137,280.88

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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.