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Finding the Fourth Proportional to 128,751.14, 193,089.80 and 38,802.56

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Solution

The fourth proportional to 128,751.14, 193,089.80 and 38,802.56 is: 58,192.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,751.14 : 193,089.80 = 38,802.56 : x
  2. Step 2: Convert to fraction form
    128,751.14/193,089.80 = 38,802.56/x
  3. Step 3: Cross multiply
    128,751.14x = 193,089.80 × 38,802.56
  4. Step 4: Simplify right side
    128,751.14x = 7,492,378,114.51
  5. Step 5: Solve for x
    x = 7,492,378,114.51/128,751.14
  6. Step 6: Final answer
    x = 58,192.72

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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.