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Finding the Fourth Proportional to 156,655.60, 235,056.30 and 81,860.20

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Solution

The fourth proportional to 156,655.60, 235,056.30 and 81,860.20 is: 122,828.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,655.60 : 235,056.30 = 81,860.20 : x
  2. Step 2: Convert to fraction form
    156,655.60/235,056.30 = 81,860.20/x
  3. Step 3: Cross multiply
    156,655.60x = 235,056.30 × 81,860.20
  4. Step 4: Simplify right side
    156,655.60x = 19,241,755,729.26
  5. Step 5: Solve for x
    x = 19,241,755,729.26/156,655.60
  6. Step 6: Final answer
    x = 122,828.39

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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.