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Finding the Fourth Proportional to 156,987.36, 234,966.24 and 85,800.96

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Solution

The fourth proportional to 156,987.36, 234,966.24 and 85,800.96 is: 128,420.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,987.36 : 234,966.24 = 85,800.96 : x
  2. Step 2: Convert to fraction form
    156,987.36/234,966.24 = 85,800.96/x
  3. Step 3: Cross multiply
    156,987.36x = 234,966.24 × 85,800.96
  4. Step 4: Simplify right side
    156,987.36x = 20,160,328,959.59
  5. Step 5: Solve for x
    x = 20,160,328,959.59/156,987.36
  6. Step 6: Final answer
    x = 128,420.08

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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.