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Finding the Fourth Proportional to 109,281.78, 150,807.42 and 61,539.84

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Solution

The fourth proportional to 109,281.78, 150,807.42 and 61,539.84 is: 84,924.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,281.78 : 150,807.42 = 61,539.84 : x
  2. Step 2: Convert to fraction form
    109,281.78/150,807.42 = 61,539.84/x
  3. Step 3: Cross multiply
    109,281.78x = 150,807.42 × 61,539.84
  4. Step 4: Simplify right side
    109,281.78x = 9,280,664,497.61
  5. Step 5: Solve for x
    x = 9,280,664,497.61/109,281.78
  6. Step 6: Final answer
    x = 84,924.17

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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.