Home / 156,665.10-235,070.55-81,869.70

Finding the Fourth Proportional to 156,665.10, 235,070.55 and 81,869.70

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Solution

The fourth proportional to 156,665.10, 235,070.55 and 81,869.70 is: 122,842.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,665.10 : 235,070.55 = 81,869.70 : x
  2. Step 2: Convert to fraction form
    156,665.10/235,070.55 = 81,869.70/x
  3. Step 3: Cross multiply
    156,665.10x = 235,070.55 × 81,869.70
  4. Step 4: Simplify right side
    156,665.10x = 19,245,155,407.34
  5. Step 5: Solve for x
    x = 19,245,155,407.34/156,665.10
  6. Step 6: Final answer
    x = 122,842.65

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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.