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Finding the Fourth Proportional to 85,280.80, 117,716.88 and 51,308.32

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Solution

The fourth proportional to 85,280.80, 117,716.88 and 51,308.32 is: 70,823.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,280.80 : 117,716.88 = 51,308.32 : x
  2. Step 2: Convert to fraction form
    85,280.80/117,716.88 = 51,308.32/x
  3. Step 3: Cross multiply
    85,280.80x = 117,716.88 × 51,308.32
  4. Step 4: Simplify right side
    85,280.80x = 6,039,855,348.44
  5. Step 5: Solve for x
    x = 6,039,855,348.44/85,280.80
  6. Step 6: Final answer
    x = 70,823.16

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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.