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Finding the Fourth Proportional to 66,718.79, 92,062.83 and 39,855.59

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Solution

The fourth proportional to 66,718.79, 92,062.83 and 39,855.59 is: 54,995.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,718.79 : 92,062.83 = 39,855.59 : x
  2. Step 2: Convert to fraction form
    66,718.79/92,062.83 = 39,855.59/x
  3. Step 3: Cross multiply
    66,718.79x = 92,062.83 × 39,855.59
  4. Step 4: Simplify right side
    66,718.79x = 3,669,217,946.41
  5. Step 5: Solve for x
    x = 3,669,217,946.41/66,718.79
  6. Step 6: Final answer
    x = 54,995.28

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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.