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Finding the Fourth Proportional to 63,512.40, 87,814.20 and 55,639.20

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Solution

The fourth proportional to 63,512.40, 87,814.20 and 55,639.20 is: 76,928.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,512.40 : 87,814.20 = 55,639.20 : x
  2. Step 2: Convert to fraction form
    63,512.40/87,814.20 = 55,639.20/x
  3. Step 3: Cross multiply
    63,512.40x = 87,814.20 × 55,639.20
  4. Step 4: Simplify right side
    63,512.40x = 4,885,911,836.64
  5. Step 5: Solve for x
    x = 4,885,911,836.64/63,512.40
  6. Step 6: Final answer
    x = 76,928.47

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1.5x scale

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.