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Finding the Fourth Proportional to 86,608.80, 129,913.20 and 63,280.80

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Solution

The fourth proportional to 86,608.80, 129,913.20 and 63,280.80 is: 94,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,608.80 : 129,913.20 = 63,280.80 : x
  2. Step 2: Convert to fraction form
    86,608.80/129,913.20 = 63,280.80/x
  3. Step 3: Cross multiply
    86,608.80x = 129,913.20 × 63,280.80
  4. Step 4: Simplify right side
    86,608.80x = 8,221,011,226.56
  5. Step 5: Solve for x
    x = 8,221,011,226.56/86,608.80
  6. Step 6: Final answer
    x = 94,921.20

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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.