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Finding the Fourth Proportional to 66,983.91, 92,434.46 and 38,687.91

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Solution

The fourth proportional to 66,983.91, 92,434.46 and 38,687.91 is: 53,387.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,983.91 : 92,434.46 = 38,687.91 : x
  2. Step 2: Convert to fraction form
    66,983.91/92,434.46 = 38,687.91/x
  3. Step 3: Cross multiply
    66,983.91x = 92,434.46 × 38,687.91
  4. Step 4: Simplify right side
    66,983.91x = 3,576,095,875.94
  5. Step 5: Solve for x
    x = 3,576,095,875.94/66,983.91
  6. Step 6: Final answer
    x = 53,387.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.