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Finding the Fourth Proportional to 113,376.80, 169,919.40 and 68,956.40

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Solution

The fourth proportional to 113,376.80, 169,919.40 and 68,956.40 is: 103,345.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,376.80 : 169,919.40 = 68,956.40 : x
  2. Step 2: Convert to fraction form
    113,376.80/169,919.40 = 68,956.40/x
  3. Step 3: Cross multiply
    113,376.80x = 169,919.40 × 68,956.40
  4. Step 4: Simplify right side
    113,376.80x = 11,717,030,114.16
  5. Step 5: Solve for x
    x = 11,717,030,114.16/113,376.80
  6. Step 6: Final answer
    x = 103,345.92

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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.