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Finding the Fourth Proportional to 86,404.20, 121,315.80 and 86,404.20

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Solution

The fourth proportional to 86,404.20, 121,315.80 and 86,404.20 is: 121,315.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,404.20 : 121,315.80 = 86,404.20 : x
  2. Step 2: Convert to fraction form
    86,404.20/121,315.80 = 86,404.20/x
  3. Step 3: Cross multiply
    86,404.20x = 121,315.80 × 86,404.20
  4. Step 4: Simplify right side
    86,404.20x = 10,482,194,646.36
  5. Step 5: Solve for x
    x = 10,482,194,646.36/86,404.20
  6. Step 6: Final answer
    x = 121,315.80

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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.