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Finding the Fourth Proportional to 156,775.60, 234,990.60 and 86,705.20

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Solution

The fourth proportional to 156,775.60, 234,990.60 and 86,705.20 is: 129,962.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,775.60 : 234,990.60 = 86,705.20 : x
  2. Step 2: Convert to fraction form
    156,775.60/234,990.60 = 86,705.20/x
  3. Step 3: Cross multiply
    156,775.60x = 234,990.60 × 86,705.20
  4. Step 4: Simplify right side
    156,775.60x = 20,374,906,971.12
  5. Step 5: Solve for x
    x = 20,374,906,971.12/156,775.60
  6. Step 6: Final answer
    x = 129,962.23

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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.