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Finding the Fourth Proportional to 76,252.40, 114,119.40 and 66,921.20

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Solution

The fourth proportional to 76,252.40, 114,119.40 and 66,921.20 is: 100,154.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,252.40 : 114,119.40 = 66,921.20 : x
  2. Step 2: Convert to fraction form
    76,252.40/114,119.40 = 66,921.20/x
  3. Step 3: Cross multiply
    76,252.40x = 114,119.40 × 66,921.20
  4. Step 4: Simplify right side
    76,252.40x = 7,637,007,191.28
  5. Step 5: Solve for x
    x = 7,637,007,191.28/76,252.40
  6. Step 6: Final answer
    x = 100,154.32

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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.