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Finding the Fourth Proportional to 60,718.56, 91,078.64 and 21,276.76

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Solution

The fourth proportional to 60,718.56, 91,078.64 and 21,276.76 is: 31,915.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,718.56 : 91,078.64 = 21,276.76 : x
  2. Step 2: Convert to fraction form
    60,718.56/91,078.64 = 21,276.76/x
  3. Step 3: Cross multiply
    60,718.56x = 91,078.64 × 21,276.76
  4. Step 4: Simplify right side
    60,718.56x = 1,937,858,364.41
  5. Step 5: Solve for x
    x = 1,937,858,364.41/60,718.56
  6. Step 6: Final answer
    x = 31,915.42

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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.