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Finding the Fourth Proportional to 102,019.80, 152,880.30 and 91,489.80

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Solution

The fourth proportional to 102,019.80, 152,880.30 and 91,489.80 is: 137,100.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,019.80 : 152,880.30 = 91,489.80 : x
  2. Step 2: Convert to fraction form
    102,019.80/152,880.30 = 91,489.80/x
  3. Step 3: Cross multiply
    102,019.80x = 152,880.30 × 91,489.80
  4. Step 4: Simplify right side
    102,019.80x = 13,986,988,070.94
  5. Step 5: Solve for x
    x = 13,986,988,070.94/102,019.80
  6. Step 6: Final answer
    x = 137,100.72

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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.