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Finding the Fourth Proportional to 83,915.64, 125,856.72 and 53,840.88

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Solution

The fourth proportional to 83,915.64, 125,856.72 and 53,840.88 is: 80,750.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,915.64 : 125,856.72 = 53,840.88 : x
  2. Step 2: Convert to fraction form
    83,915.64/125,856.72 = 53,840.88/x
  3. Step 3: Cross multiply
    83,915.64x = 125,856.72 × 53,840.88
  4. Step 4: Simplify right side
    83,915.64x = 6,776,236,558.71
  5. Step 5: Solve for x
    x = 6,776,236,558.71/83,915.64
  6. Step 6: Final answer
    x = 80,750.58

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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.