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Finding the Fourth Proportional to 281,057.28, 387,850.80 and 153,730.12

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Solution

The fourth proportional to 281,057.28, 387,850.80 and 153,730.12 is: 212,143.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,057.28 : 387,850.80 = 153,730.12 : x
  2. Step 2: Convert to fraction form
    281,057.28/387,850.80 = 153,730.12/x
  3. Step 3: Cross multiply
    281,057.28x = 387,850.80 × 153,730.12
  4. Step 4: Simplify right side
    281,057.28x = 59,624,350,026.10
  5. Step 5: Solve for x
    x = 59,624,350,026.10/281,057.28
  6. Step 6: Final answer
    x = 212,143.06

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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.