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Finding the Fourth Proportional to 60,907.77, 91,338.87 and 20,915.40

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Solution

The fourth proportional to 60,907.77, 91,338.87 and 20,915.40 is: 31,365.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,907.77 : 91,338.87 = 20,915.40 : x
  2. Step 2: Convert to fraction form
    60,907.77/91,338.87 = 20,915.40/x
  3. Step 3: Cross multiply
    60,907.77x = 91,338.87 × 20,915.40
  4. Step 4: Simplify right side
    60,907.77x = 1,910,389,001.60
  5. Step 5: Solve for x
    x = 1,910,389,001.60/60,907.77
  6. Step 6: Final answer
    x = 31,365.28

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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.