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Finding the Fourth Proportional to 102,158.66, 140,899.07 and 66,360.20

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Solution

The fourth proportional to 102,158.66, 140,899.07 and 66,360.20 is: 91,525.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,158.66 : 140,899.07 = 66,360.20 : x
  2. Step 2: Convert to fraction form
    102,158.66/140,899.07 = 66,360.20/x
  3. Step 3: Cross multiply
    102,158.66x = 140,899.07 × 66,360.20
  4. Step 4: Simplify right side
    102,158.66x = 9,350,090,993.39
  5. Step 5: Solve for x
    x = 9,350,090,993.39/102,158.66
  6. Step 6: Final answer
    x = 91,525.19

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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.