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Finding the Fourth Proportional to 86,532.10, 121,319.90 and 86,532.10

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Solution

The fourth proportional to 86,532.10, 121,319.90 and 86,532.10 is: 121,319.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,532.10 : 121,319.90 = 86,532.10 : x
  2. Step 2: Convert to fraction form
    86,532.10/121,319.90 = 86,532.10/x
  3. Step 3: Cross multiply
    86,532.10x = 121,319.90 × 86,532.10
  4. Step 4: Simplify right side
    86,532.10x = 10,498,065,718.79
  5. Step 5: Solve for x
    x = 10,498,065,718.79/86,532.10
  6. Step 6: Final answer
    x = 121,319.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.