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Finding the Fourth Proportional to 148,661.74, 205,167.30 and 84,987.10

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Solution

The fourth proportional to 148,661.74, 205,167.30 and 84,987.10 is: 117,290.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,661.74 : 205,167.30 = 84,987.10 : x
  2. Step 2: Convert to fraction form
    148,661.74/205,167.30 = 84,987.10/x
  3. Step 3: Cross multiply
    148,661.74x = 205,167.30 × 84,987.10
  4. Step 4: Simplify right side
    148,661.74x = 17,436,573,841.83
  5. Step 5: Solve for x
    x = 17,436,573,841.83/148,661.74
  6. Step 6: Final answer
    x = 117,290.26

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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.