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Finding the Fourth Proportional to 105,652.92, 145,540.62 and 90,496.20

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Solution

The fourth proportional to 105,652.92, 145,540.62 and 90,496.20 is: 124,661.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,652.92 : 145,540.62 = 90,496.20 : x
  2. Step 2: Convert to fraction form
    105,652.92/145,540.62 = 90,496.20/x
  3. Step 3: Cross multiply
    105,652.92x = 145,540.62 × 90,496.20
  4. Step 4: Simplify right side
    105,652.92x = 13,170,873,055.64
  5. Step 5: Solve for x
    x = 13,170,873,055.64/105,652.92
  6. Step 6: Final answer
    x = 124,661.70

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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.