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Finding the Fourth Proportional to 85,280.97, 117,685.68 and 47,039.70

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Solution

The fourth proportional to 85,280.97, 117,685.68 and 47,039.70 is: 64,913.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,280.97 : 117,685.68 = 47,039.70 : x
  2. Step 2: Convert to fraction form
    85,280.97/117,685.68 = 47,039.70/x
  3. Step 3: Cross multiply
    85,280.97x = 117,685.68 × 47,039.70
  4. Step 4: Simplify right side
    85,280.97x = 5,535,899,081.50
  5. Step 5: Solve for x
    x = 5,535,899,081.50/85,280.97
  6. Step 6: Final answer
    x = 64,913.65

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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.