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Finding the Fourth Proportional to 100,459.71, 150,689.57 and 38,130.21

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Solution

The fourth proportional to 100,459.71, 150,689.57 and 38,130.21 is: 57,195.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,459.71 : 150,689.57 = 38,130.21 : x
  2. Step 2: Convert to fraction form
    100,459.71/150,689.57 = 38,130.21/x
  3. Step 3: Cross multiply
    100,459.71x = 150,689.57 × 38,130.21
  4. Step 4: Simplify right side
    100,459.71x = 5,745,824,758.26
  5. Step 5: Solve for x
    x = 5,745,824,758.26/100,459.71
  6. Step 6: Final answer
    x = 57,195.32

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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.