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Finding the Fourth Proportional to 102,158.76, 140,899.20 and 66,360.30

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Solution

The fourth proportional to 102,158.76, 140,899.20 and 66,360.30 is: 91,525.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,158.76 : 140,899.20 = 66,360.30 : x
  2. Step 2: Convert to fraction form
    102,158.76/140,899.20 = 66,360.30/x
  3. Step 3: Cross multiply
    102,158.76x = 140,899.20 × 66,360.30
  4. Step 4: Simplify right side
    102,158.76x = 9,350,113,181.76
  5. Step 5: Solve for x
    x = 9,350,113,181.76/102,158.76
  6. Step 6: Final answer
    x = 91,525.32

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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.