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Finding the Fourth Proportional to 113,170.08, 156,178.08 and 65,419.20

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Solution

The fourth proportional to 113,170.08, 156,178.08 and 65,419.20 is: 90,280.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,170.08 : 156,178.08 = 65,419.20 : x
  2. Step 2: Convert to fraction form
    113,170.08/156,178.08 = 65,419.20/x
  3. Step 3: Cross multiply
    113,170.08x = 156,178.08 × 65,419.20
  4. Step 4: Simplify right side
    113,170.08x = 10,217,045,051.14
  5. Step 5: Solve for x
    x = 10,217,045,051.14/113,170.08
  6. Step 6: Final answer
    x = 90,280.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.