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Finding the Fourth Proportional to 157,531.60, 236,297.40 and 86,672.80

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Solution

The fourth proportional to 157,531.60, 236,297.40 and 86,672.80 is: 130,009.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,531.60 : 236,297.40 = 86,672.80 : x
  2. Step 2: Convert to fraction form
    157,531.60/236,297.40 = 86,672.80/x
  3. Step 3: Cross multiply
    157,531.60x = 236,297.40 × 86,672.80
  4. Step 4: Simplify right side
    157,531.60x = 20,480,557,290.72
  5. Step 5: Solve for x
    x = 20,480,557,290.72/157,531.60
  6. Step 6: Final answer
    x = 130,009.20

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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.