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Finding the Fourth Proportional to 86,280.80, 129,439.60 and 48,858.40

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Solution

The fourth proportional to 86,280.80, 129,439.60 and 48,858.40 is: 73,298.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,280.80 : 129,439.60 = 48,858.40 : x
  2. Step 2: Convert to fraction form
    86,280.80/129,439.60 = 48,858.40/x
  3. Step 3: Cross multiply
    86,280.80x = 129,439.60 × 48,858.40
  4. Step 4: Simplify right side
    86,280.80x = 6,324,211,752.64
  5. Step 5: Solve for x
    x = 6,324,211,752.64/86,280.80
  6. Step 6: Final answer
    x = 73,298.02

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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.