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Finding the Fourth Proportional to 85,215.84, 117,810.44 and 63,958.20

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Solution

The fourth proportional to 85,215.84, 117,810.44 and 63,958.20 is: 88,421.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,215.84 : 117,810.44 = 63,958.20 : x
  2. Step 2: Convert to fraction form
    85,215.84/117,810.44 = 63,958.20/x
  3. Step 3: Cross multiply
    85,215.84x = 117,810.44 × 63,958.20
  4. Step 4: Simplify right side
    85,215.84x = 7,534,943,683.61
  5. Step 5: Solve for x
    x = 7,534,943,683.61/85,215.84
  6. Step 6: Final answer
    x = 88,421.87

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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.