Home / 156,939.60-235,439.69-66,981

Finding the Fourth Proportional to 156,939.60, 235,439.69 and 66,981

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Solution

The fourth proportional to 156,939.60, 235,439.69 and 66,981 is: 100,484.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,939.60 : 235,439.69 = 66,981 : x
  2. Step 2: Convert to fraction form
    156,939.60/235,439.69 = 66,981/x
  3. Step 3: Cross multiply
    156,939.60x = 235,439.69 × 66,981
  4. Step 4: Simplify right side
    156,939.60x = 15,769,985,875.89
  5. Step 5: Solve for x
    x = 15,769,985,875.89/156,939.60
  6. Step 6: Final answer
    x = 100,484.43

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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.