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Finding the Fourth Proportional to 60,825.40, 91,246.78 and 18,709

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Solution

The fourth proportional to 60,825.40, 91,246.78 and 18,709 is: 28,066.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,825.40 : 91,246.78 = 18,709 : x
  2. Step 2: Convert to fraction form
    60,825.40/91,246.78 = 18,709/x
  3. Step 3: Cross multiply
    60,825.40x = 91,246.78 × 18,709
  4. Step 4: Simplify right side
    60,825.40x = 1,707,136,007.02
  5. Step 5: Solve for x
    x = 1,707,136,007.02/60,825.40
  6. Step 6: Final answer
    x = 28,066.17

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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.