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Finding the Fourth Proportional to 85,378.82, 117,830.88 and 60,835.82

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Solution

The fourth proportional to 85,378.82, 117,830.88 and 60,835.82 is: 83,959.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,378.82 : 117,830.88 = 60,835.82 : x
  2. Step 2: Convert to fraction form
    85,378.82/117,830.88 = 60,835.82/x
  3. Step 3: Cross multiply
    85,378.82x = 117,830.88 × 60,835.82
  4. Step 4: Simplify right side
    85,378.82x = 7,168,338,206.12
  5. Step 5: Solve for x
    x = 7,168,338,206.12/85,378.82
  6. Step 6: Final answer
    x = 83,959.21

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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.