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Finding the Fourth Proportional to 91,449.40, 136,906.80 and 65,205.40

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Solution

The fourth proportional to 91,449.40, 136,906.80 and 65,205.40 is: 97,617.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,449.40 : 136,906.80 = 65,205.40 : x
  2. Step 2: Convert to fraction form
    91,449.40/136,906.80 = 65,205.40/x
  3. Step 3: Cross multiply
    91,449.40x = 136,906.80 × 65,205.40
  4. Step 4: Simplify right side
    91,449.40x = 8,927,062,656.72
  5. Step 5: Solve for x
    x = 8,927,062,656.72/91,449.40
  6. Step 6: Final answer
    x = 97,617.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.