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Finding the Fourth Proportional to 91,450.40, 136,908.30 and 65,206.40

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Solution

The fourth proportional to 91,450.40, 136,908.30 and 65,206.40 is: 97,619.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,450.40 : 136,908.30 = 65,206.40 : x
  2. Step 2: Convert to fraction form
    91,450.40/136,908.30 = 65,206.40/x
  3. Step 3: Cross multiply
    91,450.40x = 136,908.30 × 65,206.40
  4. Step 4: Simplify right side
    91,450.40x = 8,927,297,373.12
  5. Step 5: Solve for x
    x = 8,927,297,373.12/91,450.40
  6. Step 6: Final answer
    x = 97,619.01

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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.