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Finding the Fourth Proportional to 157,486.60, 236,229.90 and 86,627.80

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Solution

The fourth proportional to 157,486.60, 236,229.90 and 86,627.80 is: 129,941.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,486.60 : 236,229.90 = 86,627.80 : x
  2. Step 2: Convert to fraction form
    157,486.60/236,229.90 = 86,627.80/x
  3. Step 3: Cross multiply
    157,486.60x = 236,229.90 × 86,627.80
  4. Step 4: Simplify right side
    157,486.60x = 20,464,076,531.22
  5. Step 5: Solve for x
    x = 20,464,076,531.22/157,486.60
  6. Step 6: Final answer
    x = 129,941.70

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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.