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Finding the Fourth Proportional to 89,988.70, 134,969.16 and 30,018.23

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Solution

The fourth proportional to 89,988.70, 134,969.16 and 30,018.23 is: 45,022.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,988.70 : 134,969.16 = 30,018.23 : x
  2. Step 2: Convert to fraction form
    89,988.70/134,969.16 = 30,018.23/x
  3. Step 3: Cross multiply
    89,988.70x = 134,969.16 × 30,018.23
  4. Step 4: Simplify right side
    89,988.70x = 4,051,535,287.79
  5. Step 5: Solve for x
    x = 4,051,535,287.79/89,988.70
  6. Step 6: Final answer
    x = 45,022.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.