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Finding the Fourth Proportional to 135,162.16, 186,518.28 and 74,728.96

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Solution

The fourth proportional to 135,162.16, 186,518.28 and 74,728.96 is: 103,122.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,162.16 : 186,518.28 = 74,728.96 : x
  2. Step 2: Convert to fraction form
    135,162.16/186,518.28 = 74,728.96/x
  3. Step 3: Cross multiply
    135,162.16x = 186,518.28 × 74,728.96
  4. Step 4: Simplify right side
    135,162.16x = 13,938,317,085.39
  5. Step 5: Solve for x
    x = 13,938,317,085.39/135,162.16
  6. Step 6: Final answer
    x = 103,122.92

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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.