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Finding the Fourth Proportional to 128,396.64, 192,619.08 and 58,280.88

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Solution

The fourth proportional to 128,396.64, 192,619.08 and 58,280.88 is: 87,432.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,396.64 : 192,619.08 = 58,280.88 : x
  2. Step 2: Convert to fraction form
    128,396.64/192,619.08 = 58,280.88/x
  3. Step 3: Cross multiply
    128,396.64x = 192,619.08 × 58,280.88
  4. Step 4: Simplify right side
    128,396.64x = 11,226,009,487.19
  5. Step 5: Solve for x
    x = 11,226,009,487.19/128,396.64
  6. Step 6: Final answer
    x = 87,432.27

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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.