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Finding the Fourth Proportional to 105,690.79, 158,530.68 and 26,805.70

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Solution

The fourth proportional to 105,690.79, 158,530.68 and 26,805.70 is: 40,207.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,690.79 : 158,530.68 = 26,805.70 : x
  2. Step 2: Convert to fraction form
    105,690.79/158,530.68 = 26,805.70/x
  3. Step 3: Cross multiply
    105,690.79x = 158,530.68 × 26,805.70
  4. Step 4: Simplify right side
    105,690.79x = 4,249,525,848.88
  5. Step 5: Solve for x
    x = 4,249,525,848.88/105,690.79
  6. Step 6: Final answer
    x = 40,207.15

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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.