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Finding the Fourth Proportional to 128,045.57, 192,051.47 and 39,291.64

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Solution

The fourth proportional to 128,045.57, 192,051.47 and 39,291.64 is: 58,932.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,045.57 : 192,051.47 = 39,291.64 : x
  2. Step 2: Convert to fraction form
    128,045.57/192,051.47 = 39,291.64/x
  3. Step 3: Cross multiply
    128,045.57x = 192,051.47 × 39,291.64
  4. Step 4: Simplify right side
    128,045.57x = 7,546,016,838.81
  5. Step 5: Solve for x
    x = 7,546,016,838.81/128,045.57
  6. Step 6: Final answer
    x = 58,932.28

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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.