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Finding the Fourth Proportional to 65,678.51, 90,637.31 and 38,448.34

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Solution

The fourth proportional to 65,678.51, 90,637.31 and 38,448.34 is: 53,059.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,678.51 : 90,637.31 = 38,448.34 : x
  2. Step 2: Convert to fraction form
    65,678.51/90,637.31 = 38,448.34/x
  3. Step 3: Cross multiply
    65,678.51x = 90,637.31 × 38,448.34
  4. Step 4: Simplify right side
    65,678.51x = 3,484,853,981.09
  5. Step 5: Solve for x
    x = 3,484,853,981.09/65,678.51
  6. Step 6: Final answer
    x = 53,059.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.