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Finding the Fourth Proportional to 99,531.70, 149,297.55 and 73,287.70

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Solution

The fourth proportional to 99,531.70, 149,297.55 and 73,287.70 is: 109,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,531.70 : 149,297.55 = 73,287.70 : x
  2. Step 2: Convert to fraction form
    99,531.70/149,297.55 = 73,287.70/x
  3. Step 3: Cross multiply
    99,531.70x = 149,297.55 × 73,287.70
  4. Step 4: Simplify right side
    99,531.70x = 10,941,674,055.14
  5. Step 5: Solve for x
    x = 10,941,674,055.14/99,531.70
  6. Step 6: Final answer
    x = 109,931.55

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Similar ratio
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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.