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Finding the Fourth Proportional to 258,483.74, 387,877.33 and 108,712.51

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Solution

The fourth proportional to 258,483.74, 387,877.33 and 108,712.51 is: 163,132.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,483.74 : 387,877.33 = 108,712.51 : x
  2. Step 2: Convert to fraction form
    258,483.74/387,877.33 = 108,712.51/x
  3. Step 3: Cross multiply
    258,483.74x = 387,877.33 × 108,712.51
  4. Step 4: Simplify right side
    258,483.74x = 42,167,119,770.16
  5. Step 5: Solve for x
    x = 42,167,119,770.16/258,483.74
  6. Step 6: Final answer
    x = 163,132.58

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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.