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Finding the Fourth Proportional to 128,661.36, 192,984.72 and 38,702.16

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Solution

The fourth proportional to 128,661.36, 192,984.72 and 38,702.16 is: 58,051.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,661.36 : 192,984.72 = 38,702.16 : x
  2. Step 2: Convert to fraction form
    128,661.36/192,984.72 = 38,702.16/x
  3. Step 3: Cross multiply
    128,661.36x = 192,984.72 × 38,702.16
  4. Step 4: Simplify right side
    128,661.36x = 7,468,925,511.00
  5. Step 5: Solve for x
    x = 7,468,925,511.00/128,661.36
  6. Step 6: Final answer
    x = 58,051.04

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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.