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Finding the Fourth Proportional to 86,575.20, 121,555.20 and 86,575.20

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Solution

The fourth proportional to 86,575.20, 121,555.20 and 86,575.20 is: 121,555.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,575.20 : 121,555.20 = 86,575.20 : x
  2. Step 2: Convert to fraction form
    86,575.20/121,555.20 = 86,575.20/x
  3. Step 3: Cross multiply
    86,575.20x = 121,555.20 × 86,575.20
  4. Step 4: Simplify right side
    86,575.20x = 10,523,665,751.04
  5. Step 5: Solve for x
    x = 10,523,665,751.04/86,575.20
  6. Step 6: Final answer
    x = 121,555.20

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1.5x scale

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.