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Finding the Fourth Proportional to 103,117.40, 154,676.10 and 76,873.40

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Solution

The fourth proportional to 103,117.40, 154,676.10 and 76,873.40 is: 115,310.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,117.40 : 154,676.10 = 76,873.40 : x
  2. Step 2: Convert to fraction form
    103,117.40/154,676.10 = 76,873.40/x
  3. Step 3: Cross multiply
    103,117.40x = 154,676.10 × 76,873.40
  4. Step 4: Simplify right side
    103,117.40x = 11,890,477,705.74
  5. Step 5: Solve for x
    x = 11,890,477,705.74/103,117.40
  6. Step 6: Final answer
    x = 115,310.10

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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.