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Finding the Fourth Proportional to 103,117.80, 154,374.30 and 76,938.60

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Solution

The fourth proportional to 103,117.80, 154,374.30 and 76,938.60 is: 115,182.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,117.80 : 154,374.30 = 76,938.60 : x
  2. Step 2: Convert to fraction form
    103,117.80/154,374.30 = 76,938.60/x
  3. Step 3: Cross multiply
    103,117.80x = 154,374.30 × 76,938.60
  4. Step 4: Simplify right side
    103,117.80x = 11,877,342,517.98
  5. Step 5: Solve for x
    x = 11,877,342,517.98/103,117.80
  6. Step 6: Final answer
    x = 115,182.27

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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.