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Finding the Fourth Proportional to 128,386.32, 192,529.72 and 44,130.64

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Solution

The fourth proportional to 128,386.32, 192,529.72 and 44,130.64 is: 66,178.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,386.32 : 192,529.72 = 44,130.64 : x
  2. Step 2: Convert to fraction form
    128,386.32/192,529.72 = 44,130.64/x
  3. Step 3: Cross multiply
    128,386.32x = 192,529.72 × 44,130.64
  4. Step 4: Simplify right side
    128,386.32x = 8,496,459,762.62
  5. Step 5: Solve for x
    x = 8,496,459,762.62/128,386.32
  6. Step 6: Final answer
    x = 66,178.86

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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.