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Finding the Fourth Proportional to 76,359.50, 114,541.42 and 20,955.50

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Solution

The fourth proportional to 76,359.50, 114,541.42 and 20,955.50 is: 31,433.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,359.50 : 114,541.42 = 20,955.50 : x
  2. Step 2: Convert to fraction form
    76,359.50/114,541.42 = 20,955.50/x
  3. Step 3: Cross multiply
    76,359.50x = 114,541.42 × 20,955.50
  4. Step 4: Simplify right side
    76,359.50x = 2,400,272,726.81
  5. Step 5: Solve for x
    x = 2,400,272,726.81/76,359.50
  6. Step 6: Final answer
    x = 31,433.85

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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.