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Finding the Fourth Proportional to 70,686.90, 97,546.84 and 38,855.12

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Solution

The fourth proportional to 70,686.90, 97,546.84 and 38,855.12 is: 53,619.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,686.90 : 97,546.84 = 38,855.12 : x
  2. Step 2: Convert to fraction form
    70,686.90/97,546.84 = 38,855.12/x
  3. Step 3: Cross multiply
    70,686.90x = 97,546.84 × 38,855.12
  4. Step 4: Simplify right side
    70,686.90x = 3,790,194,173.82
  5. Step 5: Solve for x
    x = 3,790,194,173.82/70,686.90
  6. Step 6: Final answer
    x = 53,619.47

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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.