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Finding the Fourth Proportional to 86,909.10, 130,363.65 and 86,909.10

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Solution

The fourth proportional to 86,909.10, 130,363.65 and 86,909.10 is: 130,363.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,909.10 : 130,363.65 = 86,909.10 : x
  2. Step 2: Convert to fraction form
    86,909.10/130,363.65 = 86,909.10/x
  3. Step 3: Cross multiply
    86,909.10x = 130,363.65 × 86,909.10
  4. Step 4: Simplify right side
    86,909.10x = 11,329,787,494.22
  5. Step 5: Solve for x
    x = 11,329,787,494.22/86,909.10
  6. Step 6: Final answer
    x = 130,363.65

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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.