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Finding the Fourth Proportional to 60,907.51, 91,338.51 and 20,915.14

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Solution

The fourth proportional to 60,907.51, 91,338.51 and 20,915.14 is: 31,364.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,907.51 : 91,338.51 = 20,915.14 : x
  2. Step 2: Convert to fraction form
    60,907.51/91,338.51 = 20,915.14/x
  3. Step 3: Cross multiply
    60,907.51x = 91,338.51 × 20,915.14
  4. Step 4: Simplify right side
    60,907.51x = 1,910,357,724.04
  5. Step 5: Solve for x
    x = 1,910,357,724.04/60,907.51
  6. Step 6: Final answer
    x = 31,364.90

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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.