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Finding the Fourth Proportional to 86,410.80, 129,616.20 and 53,962.20

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Solution

The fourth proportional to 86,410.80, 129,616.20 and 53,962.20 is: 80,943.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,410.80 : 129,616.20 = 53,962.20 : x
  2. Step 2: Convert to fraction form
    86,410.80/129,616.20 = 53,962.20/x
  3. Step 3: Cross multiply
    86,410.80x = 129,616.20 × 53,962.20
  4. Step 4: Simplify right side
    86,410.80x = 6,994,375,307.64
  5. Step 5: Solve for x
    x = 6,994,375,307.64/86,410.80
  6. Step 6: Final answer
    x = 80,943.30

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1.5x scale

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.