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Finding the Fourth Proportional to 85,281.82, 117,721.34 and 64,122.55

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Solution

The fourth proportional to 85,281.82, 117,721.34 and 64,122.55 is: 88,513.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,281.82 : 117,721.34 = 64,122.55 : x
  2. Step 2: Convert to fraction form
    85,281.82/117,721.34 = 64,122.55/x
  3. Step 3: Cross multiply
    85,281.82x = 117,721.34 × 64,122.55
  4. Step 4: Simplify right side
    85,281.82x = 7,548,592,510.22
  5. Step 5: Solve for x
    x = 7,548,592,510.22/85,281.82
  6. Step 6: Final answer
    x = 88,513.50

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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.