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Finding the Fourth Proportional to 66,813.80, 92,210.82 and 38,520.50

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Solution

The fourth proportional to 66,813.80, 92,210.82 and 38,520.50 is: 53,162.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,813.80 : 92,210.82 = 38,520.50 : x
  2. Step 2: Convert to fraction form
    66,813.80/92,210.82 = 38,520.50/x
  3. Step 3: Cross multiply
    66,813.80x = 92,210.82 × 38,520.50
  4. Step 4: Simplify right side
    66,813.80x = 3,552,006,891.81
  5. Step 5: Solve for x
    x = 3,552,006,891.81/66,813.80
  6. Step 6: Final answer
    x = 53,162.77

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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.